题目内容
解方程:
x-
=
x-25%x=7.5.
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
x-25%x=7.5.
(1)
x-
=
,
x-
+
=
+
,
x×5=
×5,
x=2;
(2)x-25%x=7.5,
0.75x=7.5,
0.75x÷0.75=7.5÷0.75,
x=10.
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
| 2 |
| 5 |
x=2;
(2)x-25%x=7.5,
0.75x=7.5,
0.75x÷0.75=7.5÷0.75,
x=10.
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