题目内容
解方程:
| X-
| 2X-
|
(1)
+X=
,
+X-
=
-
,
x=
;
(2)X-
=
,
X-
+
=
+
,
x=1;
(3)2X-
=
,
2X-
+
=
+
,
2x=1,
2x÷2=1÷2,
x=0.5.
| 1 |
| 2 |
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 2 |
| 2 |
| 3 |
| 1 |
| 2 |
x=
| 1 |
| 6 |
(2)X-
| 1 |
| 8 |
| 7 |
| 8 |
X-
| 1 |
| 8 |
| 1 |
| 8 |
| 7 |
| 8 |
| 1 |
| 8 |
x=1;
(3)2X-
| 3 |
| 4 |
| 1 |
| 4 |
2X-
| 3 |
| 4 |
| 3 |
| 4 |
| 1 |
| 4 |
| 3 |
| 4 |
2x=1,
2x÷2=1÷2,
x=0.5.
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