题目内容
解方程.
X-
| 2X+
|
根据题意可得:
(1)X-
X=
,
X=
,
X÷
=
÷
,
X=
;
(2)2X+
=
,
2X+
-
=
-
,
2X=
,
2X÷2=
÷2,
X=
.
(1)X-
| 2 |
| 7 |
| 3 |
| 4 |
| 5 |
| 7 |
| 3 |
| 4 |
| 5 |
| 7 |
| 5 |
| 7 |
| 3 |
| 4 |
| 5 |
| 7 |
X=
| 21 |
| 20 |
(2)2X+
| 1 |
| 4 |
| 3 |
| 5 |
2X+
| 1 |
| 4 |
| 1 |
| 4 |
| 3 |
| 5 |
| 1 |
| 4 |
2X=
| 7 |
| 20 |
2X÷2=
| 7 |
| 20 |
X=
| 7 |
| 40 |
练习册系列答案
相关题目