题目内容
| 解方程 ①X-
| ②
| ||||||||
③2X-
| ④X+
|
①X-
=
,
X-
+
=
+
,
X=1;
②
+X=
,
+X-
=
-
,
X=
;
③2X-
=
,
2X-
+
=
+
,
2X=1,
2X÷2=1÷2,
X=
;
④X+
=
,
X+
-
=
-
,
X=
.
| 7 |
| 8 |
| 1 |
| 8 |
X-
| 7 |
| 8 |
| 7 |
| 8 |
| 1 |
| 8 |
| 7 |
| 8 |
X=1;
②
| 1 |
| 2 |
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 2 |
| 2 |
| 3 |
| 1 |
| 2 |
X=
| 1 |
| 6 |
③2X-
| 3 |
| 4 |
| 1 |
| 4 |
2X-
| 3 |
| 4 |
| 3 |
| 4 |
| 1 |
| 4 |
| 3 |
| 4 |
2X=1,
2X÷2=1÷2,
X=
| 1 |
| 2 |
④X+
| 3 |
| 7 |
| 3 |
| 4 |
X+
| 3 |
| 7 |
| 3 |
| 7 |
| 3 |
| 4 |
| 3 |
| 7 |
X=
| 9 |
| 28 |
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