题目内容
解方程.
(1)2x+
|
(2)
|
(1)2x+
=
,
2x+
-
=
-
,
2x=
,
2x÷2=
÷2,
x=
,
(2)
x-
x=7,
x=7,
x×
=7×
,
x=15.
| 5 |
| 8 |
| 3 |
| 4 |
2x+
| 5 |
| 8 |
| 5 |
| 8 |
| 3 |
| 4 |
| 5 |
| 8 |
2x=
| 1 |
| 8 |
2x÷2=
| 1 |
| 8 |
x=
| 1 |
| 16 |
(2)
| 2 |
| 3 |
| 1 |
| 5 |
| 7 |
| 15 |
| 7 |
| 15 |
| 15 |
| 7 |
| 15 |
| 7 |
x=15.
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