题目内容
解下列方程.
3x-
=
x÷
=
.
3x-
| 3 |
| 5 |
| 2 |
| 5 |
x÷
| 4 |
| 5 |
| 15 |
| 28 |
(1)3x-
=
3x-
+
=
+
3x=1
3x÷3=1÷3
x=
(2)x÷
=
x÷
×
=
×
x=
| 3 |
| 5 |
| 2 |
| 5 |
3x-
| 3 |
| 5 |
| 3 |
| 5 |
| 2 |
| 5 |
| 3 |
| 5 |
3x=1
3x÷3=1÷3
x=
| 1 |
| 3 |
(2)x÷
| 4 |
| 5 |
| 15 |
| 28 |
x÷
| 4 |
| 5 |
| 4 |
| 5 |
| 15 |
| 28 |
| 4 |
| 5 |
x=
| 3 |
| 7 |
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