题目内容
解方程:
(1)5x=75
(2)2x-
=
.
(1)5x=75
(2)2x-
| 1 |
| 3 |
| 1 |
| 2 |
(1)5x=75,
5x÷5=75÷5,
x=15;
(2)2x-
=
,
2x-
+
=
+
,
2x=
,
2x÷2=
÷2,
x=
.
5x÷5=75÷5,
x=15;
(2)2x-
| 1 |
| 3 |
| 1 |
| 2 |
2x-
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 3 |
2x=
| 5 |
| 6 |
2x÷2=
| 5 |
| 6 |
x=
| 5 |
| 12 |
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