题目内容
解方程
3x=
|
|
5x+
|
(1)3x=
x+5.2,
3x-
x=
x+5.2-
x,
2
x÷2
=5.2÷2
,
x=2;
(2)
x-
x=30,
x=30,
x÷
=30÷
,
x=60;
(3)5x+
=
,
5x+
-
=
-
,
5x÷5=
÷5,
x=
.
| 2 |
| 5 |
3x-
| 2 |
| 5 |
| 2 |
| 5 |
| 2 |
| 5 |
2
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
x=2;
(2)
| 2 |
| 3 |
| 1 |
| 6 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
x=60;
(3)5x+
| 1 |
| 4 |
| 2 |
| 3 |
5x+
| 1 |
| 4 |
| 1 |
| 4 |
| 2 |
| 3 |
| 1 |
| 4 |
5x÷5=
| 5 |
| 12 |
x=
| 1 |
| 12 |
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