六年級(jí)解方程專項(xiàng)練習(xí)200題

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1、 六年級(jí)解方程專項(xiàng)練習(xí)200題(有答案)   (1)x﹣=, (2) x=, (3) ﹣4x=, (4) 82.5﹣2x=13.6 (5) 0.78:x=3:5, (6)1﹣20%x=0.4, (8) 1(x﹣)=6, (9)2x﹣x=1.2, (10)93﹣1.7x=13.4, (11)x﹣25%x=24

2、, (12)x﹣+0.2=,   (13)0.6x+90%x=78, (14)20%x﹣2.43=0.8, (15)x﹣x=42, (16)0.6x+32.5=67.5, (17)1(x﹣0.45)=5, (18)x﹣2.25=8.25, (19):x=3:12, (20)

3、x+0.8=5.6, (21) 1.4:x=1:0.75, (22) x(2﹣)=24, (23) 4x﹣=3, (24)12x+70.3=20.1, (25)x+x=, (26)x:42=,   (27)0.5+x=, (28)0.8:=0.48:x, (29)χ﹣χ=

4、, (30)42:=χ: (31)5x﹣0.4=75%, ( 32) 6x﹣0.9=4.5, (33)2(x﹣3)=5.8, (34) 1.6x=6.4, (35) 4x﹣39=29, (36)16+8x=40, (37) x1.1=3, (38)+2x=, (39)3﹣7x=1.04, (40)x﹣1﹣x=2,

5、(41)x﹣x=14, (42)3x﹣x=, (43)=, (44)1.2:=, (45)=:, (46):=x:0.8, (47)x=+1, (48)1﹣25%X+25%x=+25%x, (49)=, (50)X=, (51) 5:8=x:32, (52)2x+30.9=24.9, (53)5.3x﹣2.9x=,

6、 (54)(7﹣2.8x)=1.5, (55)x:0.3=:, (56)150%x+66=99 (57)x+6﹣0.8x=16 (58) (59) (60)3(X﹣)=1.3 (61)(X+0.5):2=(X﹣4):, (62) X0.05=3.528, (63)2X﹣46=80, (64)44.5﹣3X=6.38, (65)4X﹣

7、7.2=10, (66)11.5X+X=20, (67)3.812+15X=87.6, (68)6X+5=17, (69)0.6(2.5+X)=4.2, (70):=X:,   (71), (72) (73), (74)4(+x)=, (75)0.25+x=,   (76)x﹣, (77)20

8、0:6=x:, (78)4X=, (79)8(x﹣2)=2(x+7), (80):18%=,   (81)﹣2x=, (82)x+x=46, (83):x=:, (84)=,   (85)5(3x﹣4)﹣2(x﹣1)=5(2x﹣1) (86)=, (87)8(2X﹣7)=5(X+13)

9、, (88)3(x+4.5)=60, (89)1.6x+2.4=7.52, (90)3(x﹣0.8)=6.3, (91)28.4﹣5x=5.8,   (92)x:= (93)+2x=, (94)x=15%, (95)x﹣x=, (96)x+50%x=6, (97):x=0.3:12, (98)4x+

10、2(8﹣x)=26, (99)x﹣=0, (100)+x=1, (101)x(+)=, (102), (103), (104)x﹣, (105)x, (106)5x+35=650, (107)7203x=80, (108)3.6x﹣0.9x=8.1, (109)44.5﹣3x=6, (110)

11、=, (111)63﹣1.8X=7.2, (112)x=, (113)x=42, (114)x+=, (115)7x3=8.19, (116)12:0.6=x:, (117)3(x+2)=4(x+1),   (118)3x﹣70%x=9.2, (119) 6+x=240, (120)2

12、2.5﹣0.4x=12.5, (121)x:3.5=4:2, (122)x﹣0.8x﹣6=16, (123):=x:8, (124), (125)x:15=:, (126)x+x=, (127)x50%﹣x=5, (128)1﹣x=, (129)2.5+1x=3, (130)3x﹣2=4, (131)8.5﹣3x=2

13、, (132)3x=4, (133)x﹣5%=17.54, (134):=:(4﹣x), (135) 6x+31=49, (136) 7x3=8.19, (137) 32.8﹣9x=17.5, (138) x﹣0.36x=16, (139) 67+3x=69, (140) 6x+2x﹣56=0, (141) 3x﹣0.454=2.7,

14、 (142) 5.8x﹣4.6x=0.96, (143) 8.4(9﹣x)=3, (144) 3x1.2=8, (145)5x+28=71, (146)8.7﹣1.2x=3.9, (147)8x﹣2.6x=37.8, (148)0.75x﹣0.954=8.5, (149)542+3x=72, (150)8x﹣2.6

15、=37.8, (151)x=, (152)x+30%x=26, (153) 7.8﹣3x=3.6, (154) 63﹣1.8x=7.2, (155)10:x=4.5:0.8, (156):=x:, (157)X﹣7.65=4.64, (158)28.25﹣X=8.25, (159)X﹣(3.6+2.97)=12.42, (160)x

16、=, (161)14.5=5.5, (162)x﹣80%x=48, (163)75%x﹣5=6, (164)x﹣6.8=15.4, (165)1.9x=5.7, (166)4.3y﹣y=4.6, (167)5x+2.6=7.6, (168) x﹣1.5=12.9, (169) 9x+5x=8.4, (170) 6.8+3.2x=14.8,

17、 (171)5x=, (172)﹣x=, (173)4.5﹣3x=1.5, (174)(1+25%)x=0.5, (175)x﹣40%x=9, (176)x20%=15.2, (178)x﹣x=, (179)x75%=3, (180)4x﹣, (181):x=:4.5, (1

18、82)(x﹣4.5)6=12.5, (183)27﹣17x=13.4, (184)9.6+3x=3.245, (185)2x+5=5x﹣7, (186) 3(x﹣2)=2﹣5(x﹣2), (187)4x﹣3(20﹣x)+4=0, (188)﹣=1, (189)4x﹣56=12, (190)8x﹣3x=15.6,

19、 (191)30(x4)=60, (192)7.20.5﹣3x=1.2,   (193)5x﹣2.45=8, (194)+x=2, (195)5x+2.415=66, (196)3.2x+2.8x-x=1, (197)2.516-8x=12, (198)9.6-3x=6.3, (199)5(x+6)=75, (200)x0.

20、7+0.93=4, 解方程專項(xiàng)練習(xí)200題答案: (1)x﹣=, =, , x=; (2) x=, x=, x21=21, x=12; (3) ﹣4x=, ﹣4x+4x=+4x, =+4x, 4=4x4, x=. (4) 82.5﹣2x=13.6 20﹣2x=13.6, 13.6+2X=20,

21、 2X=6.4, x=3.2; (5) 0.78:x=3:5, 3x=0.785, 3x=3.9, x=1.3  (6)1﹣20%x=0.4, 1﹣20%x+20%x=0.4+20%x, 0.4+20%x=1, 0.4+20%x﹣0.4=1﹣0.4, 20%x=0.6, 20%x=0.6, x=3; (8) 1(x﹣)=6, 1(x﹣)(x﹣)=6(x﹣), 1=

22、6(x﹣), 6x﹣6=1, 6x﹣3=1, 6x=4, 6x6=46, x= (9)2x﹣x=1.2, x(2﹣)=1.2, x=1.2, x=1.2, x=1; (10)93﹣1.7x=13.4, 27﹣1.7x=13.4, 27﹣1.7x+1.7x=13.4+1.7x, 13.4+1.7x=27, 13.4+1.7x

23、﹣13.4=27﹣13.4, 1.7x=13.6, 1.7x1.7=13.61.7, x=8 (11)x﹣25%x=24, 75%x=24, 75%x75%=2475%, x=32; (12)x﹣+0.2=, x﹣0.6=, x﹣0.6+0.6=+0.6, x=, x=, x=1   (13)0.6x+90%x=78, 1.5x=78, 1.5x1.5=781.5,

24、 x=52; (14)20%x﹣2.43=0.8, 20%x﹣7.2=0.8, 20%x﹣7.2+7.2=0.8+7.2, 20%x20%=820%, x=40; (15)x﹣x=42, x=42, x=42, x=252 (16)0.6x+32.5=67.5, 0.6x+7.5=67.5, 0.6x+7.5﹣7.5=67.5﹣7.5, 0.6x=60,

25、 0.6x0.6=600.6, x=100; (17)1(x﹣0.45)=5, (x﹣0.45)(x﹣0.45)=(x﹣0.45), x﹣2.4=1.6, x﹣2.4+2.4=1.6+2.4, x=4, x=4, x= (18)x﹣2.25=8.25, x﹣2.25+2.25=8.25+2.25, x=10.5; (19):x=3:12, 3x=12, 3x3=93, x=3

26、(20)x+0.8=5.6, x+0.8﹣0.8=5.6﹣0.8, x=4.8, x=4.8, x=8. (21) 1.4:x=1:0.75, x=1.40.75, x=1.05 (22) x(2﹣)=24, x=24, x=24, x=20; (23) 4x﹣=3, 4x﹣+=3+, 4x=4, 4x4=44, x=1 (24)12x+70.3=20.1, 12x+2.

27、1=20.1, 12x+2.1﹣2.1=20.1﹣2.1, 12x12=1812, x=1.5; (25)x+x=, x=, x, x=; (26)x:42=, 10x=42, 10x10=3010, x=3   (27)0.5+x=, 0.75+x=3.75, 0.75+x﹣0.75=3.75﹣0.75, x=3,

28、 x=3, x=6; (28)0.8:=0.48:x, 0.8x=0.48, 0.8x=0.2, 0.8x0.8=0.20.8, x= (29)χ﹣χ=, x=, x=, x=3; (30)42:=χ: x=42, x=30, x=50; (31)5x﹣0.4=75%, 5x﹣0.4+0.4=75%+0.4, 5x5=1.155, x=0.2

29、3   ( 32) 6x﹣0.9=4.5, 6x﹣0.9+0.9=4.5+0.9, 6x=5.4, 6x6=5.46, x=0.9; (33)2(x﹣3)=5.8, 2(x﹣3)2=5.82 x﹣3=2.9, x﹣3+3=2.9+3, x=5.9; (34) 1.6x=6.4, 1.6x1.6=6.41.6, x=4; (35) 4x﹣39=29, 4x﹣27=29, 4x﹣27+27=29+27,

30、 4x=56, 4x4=564, x=14; (36)16+8x=40, 16+8x﹣16=40﹣16, 8x=24, 8x8=248, x=3; (37) x1.1=3, x1.11.1=31.1, x=3.3 (38)+2x=, +2x=, 2x=, 2x2=2, x=; (39)3﹣7x=1.04, 2.16﹣7x=1.04, 2.16﹣7x﹣1.04=1.04﹣1.04,

31、 1.12﹣7x=0, 7x7=1.127, x=0.16; (40)x﹣1﹣x=2, x﹣1=2, x﹣1+1=2+1, x=3, x=3, x=18; (41)x﹣x=14, x=14, x=14, x=18; (42)3x﹣x=, x=, x=, x=; (43)=, 2.4x=720.26, 2.4x=18.72, 2.4x2.4=18.722.4, x=7.8;

32、(44)1.2:=, x=1.25, x=6, x=6, x=9; (45)=:, x=18, x=, x=, x=12; (46):=x:0.8, x=0.8, x=0.04, x=0.2; (47)x=+1, x=, x=1  (48) 1﹣25%X+25%x=+25%x, 0.25x+0.25﹣0.25=1﹣0.25, 0.25x=0.75, x=3; (49)=, 0.25x=1.251.6, 0.25x0.2

33、5=1.251.60.25, x=8; (50)X=, X=, x=; (51) 5:8=x:32, 8x=532, 8x8=5328, x=20 (52)2x+30.9=24.9, 2x+2.7=24.9, 2x+2.7﹣2.7=24.9﹣2.7, 2x2=22.22, x=11.1; (53)5.3x﹣2.9x=, 2.4x=, 2.4x2.4=2.4,

34、 x=; (54)(7﹣2.8x)=1.5, (7﹣2.8x)=1.5, 7﹣2.8x=2.1, 7﹣2.8x+2.8x=2.1+2.8x, 7﹣2.1=2.1+2.8x﹣2.1, 4.92.8=2.8x2.8, x=1.75; (55)x:0.3=:, x=0.3, x=, x=  (56) 150%x+66=99 1.5x+66=99 1.5x=33 x=22 (5

35、7)x+6﹣0.8x=16 0.2x+6=16 0.2x=10 x=50 (58) x=14.4 (59) 0.55x=5.5 x=10 (60)3(X﹣)=1.3 3(X﹣)(x﹣)=1.3(x﹣), 3=1.3x﹣0.78, 3+0.78=1.3x﹣0.78+0.78, 4.68=1.3x, 4.681.3=1.3x1.3, x=3.6; (61)(X+0.5):

36、2=(X﹣4):, (x﹣4)=(x+0.5), x﹣4=x+0.5, x﹣10﹣x=x+x, 2.25x﹣10+10=0.125+10, 2.25x2.25=10.1252.25, x=4.5 (62) X0.05=3.528, X0.050.05=3.5280.05, X=0.1764; (63)2X﹣46=80, 2X﹣24=80, 2X﹣24+24=80+24, 2X=104, 2X2=1042, X=52; (64)

37、44.5﹣3X=6.38, 18﹣3X=6.38, 18﹣3X+3X=6.38+3X, 6.38+3X=18, 6.38+3X﹣6.38=18﹣6.38, 3X=11.62, 3X3=11.623, X=; (65)4X﹣7.2=10, 4X﹣7.2+7.2=10+7.2, 4X=17.2, 4X4=17.24, X=4.3; (66)11.5X+X=20, 12.5X=20, 12.5X12.5=2012.5,

38、 X=1.6; (67)3.812+15X=87.6, 45.6+15X=87.6, 45.6+15X﹣45.6=87.6﹣45.6, 15X=42, 15X15=4215, X=2.8 (68)6X+5=17, 6x+5﹣5=17﹣5, 6x6=126, x=2; (69)0.6(2.5+X)=4.2, 0.6(2.5+X)0.6=4.20.6, 2.5+x=7, 2.5+x﹣2.5

39、=7﹣2.5, x=4.5; (70):=X:, x=, x=, x=0.6   (71), , , ; (72) , , , , ; (73), , , (74)4(+x)=, +4x=, +4x﹣=﹣, 4x=4, x=1; (75)0.25+x=, 0.2+x=, 0.2+x﹣0.2=﹣0.2,

40、 x=, x=   (76)x﹣, , , x=; (77)200:6=x:, 6x=200, 6x6=4806, x=80   (78)4X=, 4XX=X, X=4, X=4, X=10; (79)8(x﹣2)=2(x+7), 8X﹣16=2X+14, 6X﹣16=14, 6X=30,

41、 X=5; (80):18%=, X=0.186.5, X=1.17, X=7.8   (81)﹣2x=, ﹣2x+2x=+2x, +2x=, +2x﹣=﹣, 2x=, 2x2=2, x=; (82)x+x=46, x(+)=46, x=46, x=46, x=40; (83):x=:, x=, x=, x=, x=; (

42、84)=, 1.6x=6.42, 1.6x=12.8, 1.6x1.6=12.81.6, x=8   (85)5(3x﹣4)﹣2(x﹣1)=5(2x﹣1) 15x﹣20﹣2x+2=10x﹣5, 13x﹣18=10x﹣5, 13x﹣18﹣10x=10x﹣5﹣10x, 3x﹣18=﹣5, 3x﹣18+18=﹣5+18,

43、 3x=13, 3x3=133, x=; (86)=, 3(6x﹣1)=64, 18x﹣3=64, 18x﹣3+3=64+3, 18x=67, 18x18=6718, x= (87)8(2X﹣7)=5(X+13), 16x﹣56=5x+65, 16x﹣56﹣5x=5x+65﹣5x, 11x﹣56=65, 1

44、1x﹣56+56=65+56, 11x=121, 11x11=12111, x=11, (88)3(x+4.5)=60, 3(x+4.5)3=603, x+4.5=20, x+4.5﹣4.5=20﹣4.5, x=15.5 (89)1.6x+2.4=7.52, 1.6x+2.4﹣2.4=7.52﹣2.4, 1.6x=5.12, 1.6x1.6=5.121.6,

45、 x=3.2; (90)3(x﹣0.8)=6.3, 3x﹣2.4=6.3, 3x﹣2.4+2.4=6.3+2.4, 3x=8.7, 3x3=8.73, x=2.9; (91)28.4﹣5x=5.8, 28.4﹣5x+5x=5.8+5x, 5.8+5x=28.4, 5.8+5x﹣5.8=28.4﹣5.8, 5x=22.6, 5x5=22.65, x=4.52

46、  (92) x:= 25x=3, 25x=, 25x25=, x=; (93)+2x=, +2x=, 2x=0, x=0; (94)x=15%, xx=15%x, 0.15x=0.15, 0.15x0.15=0.150.15, x=1; (95)x﹣x=, x=, x=, x=. (96)x+50%x=6, 1.5x=6, 1.5x1.5=61.5, x

47、=4; (97):x=0.3:12, 0.3x=, 0.3x0.3=90.3, x=30; (98)4x+2(8﹣x)=26, 4x+16﹣2x=26, 2x+16=26, 2x+16﹣16=26﹣16, 2x2=102, x=5 (99)x﹣=0, x﹣+=0+, x=, x3=3, x=; (100)+x=1, +x﹣=1﹣, x=, x=, x=1; (101)x(+)=, x=,

48、 x=, x=. (102), , , 3x3=, x=; (103), , , x=20; (104)x﹣, , , x=; (105)x, x, x= (106)5x+35=650, 5x+35﹣35=650﹣35, 5x=615, 5x5=6155, x=123; (107)7203x=80

49、, 7203x3x=803x, 240x=720, 240x240=720240, x=3; (108)3.6x﹣0.9x=8.1, (3.6﹣0.9)x=8.1, 2.7x=8.1, 2.7x2.7=8.12.7, x=3; (109)44.5﹣3x=6, 18﹣3x=6, 18﹣3x+3x=6+3x, 6+3x=18, 6+3x﹣6=18﹣6, 3x=12,

50、 3x3=123, x=4 (110)=, 2.5x=100.8, 2.5x2.5=82.5, x=3.2; (111)63﹣1.8X=7.2, 18﹣1.8X=7.2, 18﹣1.8X+1.8X=7.2+1.8X, 7.2+1.8X=18, 7.2+1.8X﹣7.2=18﹣7.2, 1.8X=10.8, 1.8X1.8=10.81.8, X=6 (112)x=,

51、 x=, x=; (113)x=42, x=42, x=9; (114)x+=, x+﹣=﹣, x=, x=, x= (115)7x3=8.19, 7x33=8.193, 7x=24.57, 7x7=24.577, x=3.51; (116)12:0.6=x:, 0.6x=12, 0.6x=6, 0.6x0.6=60.6,

52、 x=10; (117)3(x+2)=4(x+1), 3x+6=4x+4, 3x+6﹣3x=4x+4﹣3x, x+4=6, x+4﹣4=6﹣4, x=2   (118)3x﹣70%x=9.2, 3x﹣0.7x=9.2, 2.3x=9.2, 2.3x2.3=9.22.3, x=4; (119) 6+x=240, 6+x﹣6=240﹣6, x=234, x=234, x=3

53、90 (120)22.5﹣0.4x=12.5, 22.5﹣0.4x+0.4x=12.5+0.4x, 12.5+0.4x=22.5, 12.5+0.4x﹣12.5=22.5﹣12.5, 0.4x0.4=100.4, x=25; (121)x:3.5=4:2, 2x=3.54, 2x2=142, x=6 (122)x﹣0.8x﹣6=16, 0.2x﹣6=16, 0.2x﹣6+6=16+6, 0.

54、2x0.2=220.2, x=110; (123):=x:8, x=8, x=8, x=4; (124), 0.06x=20.015, 0.06x0.06=0.030.06, x=0.5; (125)x:15=:, x=15, x6=156, x=40; (126)x+x=, x=, x=, x=; (127)x50%﹣x=5, x=5, x6=56, x

55、=30; (128)1﹣x=, 1﹣x+x=+x, +x=1, +x﹣=1﹣, x=, x=; (129)2.5+1x=3, 2.5+1x﹣2.5=3﹣2.5, x=, x=, x= (130)3x﹣2=4, 3x﹣2+2=4+2, 3x=6, 3x3=63, x=; (131)8.5﹣3x=2, 8.5﹣3x+3x=2+3x, 3x+2=8.5, 3x+2﹣2=8.5﹣2, 3x=6,

56、 3x3=63, x=2; (132)3x=4, 3xx=4x, 4x=3, 4x4=34, x= (133)x﹣5%=17.54, 解:x﹣5%+5%=17.54+5%, x=17.59, x=23; (134):=:(4﹣x), 解:4x=, 2﹣x+x=x, 2﹣+x, =x, x=3 (135) 6x+31=49, 6x+31﹣31=49﹣31, 6

57、x=18, 6x6=186, x=3; (136) 7x3=8.19, 7x33=8.193, 7x=24.57, 7x7=24.577, x=3.51; (137) 32.8﹣9x=17.5, 32.8﹣9x+9x=17.5+9x, 17.5+9x=32.8, 17.5+9x﹣17.5=32.8﹣17.5, 9x=15.3, 9x9=15.39, x=1.7; (138) x﹣0.36x=16, (1﹣0.36)x=16,

58、 0.64x=16, 0.64x0.64=160.64, x=25; (139) 67+3x=69, 42+3x=69, 42+3x﹣42=69﹣42, 3x=27, 3x3=273, x=9; (140) 6x+2x﹣56=0, (6+2)x﹣56+56=0+56, 8x=56, 8x8=568, x=7 (141) 3x﹣0.454=2.7, 3x﹣1.8=2.7, 3x﹣1.8+

59、1.8=2.7+1.8, 3x=4.5, 3x3=4.53, x=1.5; (142) 5.8x﹣4.6x=0.96, 1.2x=0.96, 1.2x1.2=0.961.2, x=0.8; (143) 8.4(9﹣x)=3, 9﹣x=8.43, 9﹣x=2.8, x=9﹣2.8, x=6.2; (144) 3x1.2=8, 3x1.21.2=81.2,

60、 3x=9.6, 3x3=9.63, x=3.2 (145)5x+28=71, 5x+28﹣28=71﹣28, 5x=43, 5x5=435, x=8.6; (146)8.7﹣1.2x=3.9, 8.7﹣1.2x+1.2x﹣3.9=3.9+1.2x﹣3.9, 4.8=1.2x, 1.2x=4.8, 1.2x1.2=4.81.2, x=4;

61、(147)8x﹣2.6x=37.8, 5.4x=37.8, 5.4x5.4=37.85.4, x=7; (148)0.75x﹣0.954=8.5, 0.75x﹣3.8=8.5, 0.75x﹣3.8+3.8=8.5+3.8, 0.75x=12.3, 0.75x0.75=12.30.75, x=16.4,; (149)542+3x=72, 27+3x=72, 27+3x﹣27=72﹣27,

62、 3x=45, 3x3=453, x=15; (150)8x﹣2.6=37.8, 8x﹣2.6+2.6=37.8+2.6, 8x=40.4, 8x8=40.48, x=5.05 (151)x=, x=, x=, x4=4, x=; (152)x+30%x=26, (1+30%)x=26, 1.3x=26, 1.3x1.3=261.3, x=20; (153) 7.8﹣3x=3.6, 7.8﹣3x+

63、3x=3.6+3x, 3.6+3x=7.8, 3.6+3x﹣3.6=7.8﹣3.6, 3x=4.2, 3x3=4.23, x=1.4 (154) 63﹣1.8x=7.2, 18﹣1.8x=7.2, 18﹣1.8x+1.8x=7.2+1.8x, 18=7.2+1.8x, 18﹣7.2=7.2+1.8x﹣7.2, 10.8=1.8x, 10.81.8=1.8x1.8,

64、 x=6; (155)10:x=4.5:0.8, 4.5x=100.8, 4.5x=8, 4.5x4.5=84.5, x=; (156):=x:, x=, x=, x=, x= (157)X﹣7.65=4.64, X﹣7.65+8.67=4.64+7.65, X=12.29; (158)28.25﹣X=8.25, 28.25﹣X+X=8.25+X, X+8.25=28.25, X+8.25﹣8.25=28.2

65、5﹣8.25, X=20; (159)X﹣(3.6+2.97)=12.42, X﹣6.57=12.42, X﹣6.57+6.57=12.42+6.57, X=18.99 (160)x=, xx=x, x=, x=, x=, x=; (161)14.5=5.5, 14.5+14.5=5.5+14.5, =20, 8=208, x=160 (162)x﹣80%x=48, (1﹣0.8)x=48, 0.2x=48, 0.2x0.2=480.2, x=240;

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