初一解一元一次方程计算题专项训练.docx

解一元一次方程的练习题

（1）2x+5=5x-7 (2)4-3(2-x)=5x

（3）3（x-2）=2-5(x-2)

(5) 3(x?1)?2(x?2)?2x?3

(4)2(x+3)－5(1－x)=3(x－1)

(6) 3(x?2)?1?x?(2x?1)

x 2x－1 x+2

(7)

=3x-1 (8) =

2 3

2 +1

(9) 1?x?1?1

(10) x?8

??x

3 2 3

31(11) 3?1.2x?4x?12 (12)

3

1

x?0.4?

x?0.3

5

(13) x?1?1x?1x?1x

4 2

(14) 3x?1?4x?2?1

2 4 8 2 5

(15)x

?x?1?1

(16)1x?1?2x?1

2 5 2 3

(17) 3y?12 ?2?5y?7

4 3

(18) 53

?6x??7

2

x?1

(19) 1?m

2

?3?3m?1

4

(20) y?y?1?2?

2

y?25

(21)x?1?x?

x?2?1 (22)

3?x?

x?8?1

3 6 2 3

(23) 1

(x-3)=2-

1(x-3)

(24)

x?2?x?1?3

2 2 0.2 0.5

(25) x?1?

0.2

x?30.01

?3 (26)

2?18y

y?

6

?y?2

9

(27) x?2?2x?3?1

（28）x?1?

x?2?

4?x

4 6 3 6 2

233??? ? ?(29) 3?4?x?1??

2

3

3

?

?? ? ?

? ? ?

?2x

(30) 1[x?1(x?1)]?2(x?1)

2 2 3

(31)

1(1?3x)?1(2?x)?2 (32)

4?3(x?1)?3??2x?3

4 2 3 4

3??2 2 ??

(33) 2x?1?3?9

(34) 7x?12?5x?1??8?

2(6x?9)

? ?

323? ?

3

2

3

(35)x?1[x?1(x?6)]?1(x?6)?3

（36）3?2?1x?1??2??21?2x

2 3 6

? ?

2 3 4 2 3

??? ? ? ?

?

?