题目内容
解下列方程.
3Χ+
|
Χ-
|
(1)3x+
=
,
3x+
-
=
-
,
3x÷3=1
÷3,
x=
;
(2)x-
x=
.
x=
,
x÷
=
÷
,
x=
.
| 1 |
| 2 |
| 5 |
| 3 |
3x+
| 1 |
| 2 |
| 1 |
| 2 |
| 5 |
| 3 |
| 1 |
| 2 |
3x÷3=1
| 1 |
| 6 |
x=
| 7 |
| 18 |
(2)x-
| 4 |
| 9 |
| 10 |
| 21 |
| 5 |
| 9 |
| 10 |
| 21 |
| 5 |
| 9 |
| 5 |
| 9 |
| 10 |
| 21 |
| 5 |
| 9 |
x=
| 6 |
| 7 |
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