题目内容
解下列方程.X+
=15X-
=
.
| 8 |
| 17 |
| 7 |
| 8 |
| 9 |
| 8 |
(1)x+
=1,
x+
-
=1-
,
x=
;
(2)5x-
=
,
5x-
+
=
+
,
5x=2,
5x÷5=2÷5,
x=
.
| 8 |
| 17 |
x+
| 8 |
| 17 |
| 8 |
| 17 |
| 8 |
| 17 |
x=
| 9 |
| 17 |
(2)5x-
| 7 |
| 8 |
| 9 |
| 8 |
5x-
| 7 |
| 8 |
| 7 |
| 8 |
| 9 |
| 8 |
| 7 |
| 8 |
5x=2,
5x÷5=2÷5,
x=
| 2 |
| 5 |
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