题目内容
解方程
①
+x=
②x-
=
.
①
| 1 |
| 7 |
| 2 |
| 3 |
②x-
| 1 |
| 6 |
| 3 |
| 8 |
(1)
+x=
,
+x-
=
-
,
x=
;
(2)x-
=
,
x-
+
=
+
,
x=
.
| 1 |
| 7 |
| 2 |
| 3 |
| 1 |
| 7 |
| 1 |
| 7 |
| 2 |
| 3 |
| 1 |
| 7 |
x=
| 11 |
| 21 |
(2)x-
| 1 |
| 6 |
| 3 |
| 8 |
x-
| 1 |
| 6 |
| 1 |
| 6 |
| 3 |
| 8 |
| 1 |
| 6 |
x=
| 13 |
| 24 |
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