题目内容
解方程.
①x+
=2
②
-X=
③
-X=
.
①x+
| 5 |
| 8 |
②
| 3 |
| 4 |
| 2 |
| 5 |
③
| 7 |
| 8 |
| 1 |
| 4 |
解;①x+
=2
x+
-
=2-
x=1
;
②
-X=
x=
-
x=
;
③
-X=
x=
-
x=
.
| 5 |
| 8 |
x+
| 5 |
| 8 |
| 5 |
| 8 |
| 5 |
| 8 |
x=1
| 3 |
| 8 |
②
| 3 |
| 4 |
| 2 |
| 5 |
x=
| 3 |
| 4 |
| 2 |
| 5 |
x=
| 7 |
| 20 |
③
| 7 |
| 8 |
| 1 |
| 4 |
x=
| 7 |
| 8 |
| 1 |
| 4 |
x=
| 5 |
| 8 |
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