解一元一次方程计算题专练 (1)7(2x-1)-3(4x-1)=4(3x+2)-1; (2) (5y+1)+ (1-y)= (9y+1)+ (1-3y); (3) [ (1/4x-3)-4 ]=x+2; (4)20%+(1-20%)(320-x)=320×40% (5)2(x-2)+2=x+1 (6)2(x-2)-3(4x-1)=9(1-x) (7)11x+64-2x=100-9x (8)15-(8-5x)=7x+(4-3x) (9)3(x-7)-2[9-4(2-x)]=22 (10)3/2[2/3(1/4x-1)-2]-x=2 (11) 2x-10.3x=15 (12) 0.52x-(1-0.52)x=80 (13) x/2+3x/2=7 (14) 3x+7=32-2x (15) 3x+5(138-x)=540 (16) 3x-7(x-1)=3-2(x+3) (17) 18x+3x-3=18-2(2x-1) (18) 3(20-y)=6y-4(y-11) (19) -(x/4-1)=5 (20) 3[4(5y-1)-8]=6 (21) 31x?2?3?x; (22)(x+1)-3(x-1)=1-3x; 443x?14x?2x?4x?2??1?(x?5)?52; (23)(x-2)-2(4x-1)=3(1-x). (24)2 (25)5 x?3x?3x4?x450.1x?0.2??x?42.4??(x?4)?5x?10]??x?260.52.5 ; (28)5[40.1(26)3;(27); (29) (30) (31) (32) (33)
1、
2、 3、 4、
5、
6、 7、 8、
8、12(2x-3)=4x+4 9.
12.
2x?12x?11?yy?21(2x+14)=4-15x 10. = 11. +=3+2y 734632(x?1)5(x?1)0.1x0.9?0.2x4?6x0.02?2x??1 13. ?-?1 14、?-6.5=?-7.5 360.030.70.010.02
(1)7x?6?16?3x (2)2(3?x)??4(x?5)
(3) (5)
x?75x?81?1?2??1 (4)2x??x?(x?1)??(x?1)
2?243?32x?1x?22x?1x?1?1???1 (6)34634712y?15y?7??1?(7) (8)x-
510246
(9)3-
53x?1 (10)2(0.3x+4)=5+5(0.2x-7) 752x?15x?1x?1x?2??2?(11) (12)x-
6823
1?1?2(20)7x-?x?(x?1)??(x?1)
2?2?3(21)2{3[4(5x-1)-8]-20}-7=1
x?x?1?1?1?1???24)???x?1??6??4?=1 (25)
2?3?4?5???x?43x2?
54
(26)x-2[x-3(x+4)-5]=3{2x-[x-8(x-4)]}-2
(27)
1.8?8x1.3?3x5x?0.4???0 (28)7(3- x)-5(x-3)=8 1.220.3x?23?2x3(30)-2 =1 (31)3(x-2)-2(x-3)=5x
(32)4x+3-3x=0 (33)4x-3(20-x)=6x-7(9-x)
y?1y?2x?3x?4(34)y-2=3-5 (35)0.5-0.2=1.6
xx?5?(36)
1.54
(37)3x—1=
1—2 2(38)1- (40)
2x?4x?734?? (39)(x-1)=3 3643 (41)
x1?x?1?(42)32
x?23x?2???1(43)24
y?1y3y?1???y(44)236
(45)15(50?x)?18.2(50?x)
1?1x?4x?3?22x?x?(x?1)?(x?1)?2.5?(47)(48)?32?20.20.05 ??
(50)3?4x?1??5?3x?2??7?2x?1??1 (51)
(52)?x?3??2??x?3?
x?2x?2x?1??1? 6321212(53)
x?4x?3??225
(54)
1?xx?11?x=1??3 (55)23 2(56)2?
x?11?x??3?x(57)5x?2?x?1??17 32 x?15?xx?1(61)+=1 ?1232
(60)3?
(62)?x?5?2x (63)5?x?8??8?7?2x?3?
(64)2x?1?5x?7 (65)
3?4?x?1???34?3?
(66)
2x?4x?73?4?2??(67)x?1?3??36 4?3?
(68)
x?15?x-=1 (69)2x?2?2?2x??1 23(70)7x?6?8?3x (71)
x?12?x?1?2x?3?23=6
(72)2x?6?0 (73)
x?4x?3??20.20.5 2x?1?53
=
(75)x-3(x+2)=6 (76)
(77)2x+3=x-1 (78)11z+297
25z-97
(79)2x-1=-x+5 (80)7y=y+1
5 (81)
x?13?2x?(82)3(x-2)-2(x-3)=5x 43
y?1y?2?2?(84)4?35%?3?21?x???15?2x??20%?1 25
(83)y?
2x?3(85)
5
21?1?1?1???x?3x?1-()=0 (86)?????6??4?=1 32?3?4?5???x?x?43x2?
54(87)2{3[4(5x-1)-8]-20}-7=1 (88)
x?
(89)x-2[x-3(x+4)-5]=3{2x-[x-8(x-4)]}-2
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