题目内容
| 解方程. 3x+x=
| x-
|
(1)3x+x=
,
4x=
,
4x÷4=
÷4,
x=
;
(2)x-
x=
,
(1-
)x=
,
x=
,
x×
=
×
,
x=
.
| 4 |
| 9 |
4x=
| 4 |
| 9 |
4x÷4=
| 4 |
| 9 |
x=
| 1 |
| 9 |
(2)x-
| 1 |
| 4 |
| 7 |
| 8 |
(1-
| 1 |
| 4 |
| 7 |
| 8 |
| 3 |
| 4 |
| 7 |
| 8 |
| 3 |
| 4 |
| 4 |
| 3 |
| 7 |
| 8 |
| 4 |
| 3 |
x=
| 7 |
| 6 |
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