解一元一次方程的练习题
解下列方程:(每题4分)
(1)3(x-2)=2-5(x-2) (2) 2(x+3)-5(1-x)=3(x-1)
(3) 3(x?1)?2(x?2)?2x?3 (4) 3(x?2)?1?x?(2x?1) (5) 2x-13 =x+22 +1 (7) x?83??x (9 ) 34x?0.4?12x?0.3
(11) 3y?12?2?5y?743
(6) 1x?3?12?1 (8) 3?1.2x?45x?12
(10) 3x?14x?22?5?1 (12) 53?6x??72x?1
(13)
1?m3?3my?1y?2??1 (14) y? ?2?2425(15)x?1?xx?23?xx?8??1 (16) ??1 36
(17) 12(x-3)=2-12(x-3) (19) x?10.2?x?30.01?3 (20) (21)x?1x?24?x3?6?2 (22)
23 (18)x?20.2?x?10.5?3 x?24?2x?36?1 3?2??4??1?2??x?3???3???2x (23)
23112[x?(x?1)]?(x?1) (24)7(3y+7)=2 - 2y 223
(25)设k为整数,方程kx=4-x的解x为自然数,求k的值。
7323x?x?2x??70%x?20%x?3.6 24 55
314x??20?25%?10x?x?15%x?68 54 5
X+3X=121 5X-3×
85=5 2X÷1=12 73421
3136X+5 =13.4 X?? 3X=3
4488 X÷2=
7 X+7X=3 4X-6×2=2
716
123
5 ÷X=10 X÷ 6=26×13354525
3X-21×2103=4
6X+5 =13.4
843255 X =
72 89 4x-3 ×9 = 29 x?14x?20
25 X-13 X=3
10 3X =
16×1651
1x + 126x = 4
2(x?2.6)?8 4χ-6=38
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