- 去括号解一元一次方程(2)

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