题目内容
解方程
| X-15%X=42.5 | 3X×
|
(1)X-15%X=42.5,
85%x=42.5,
85%x÷85%=42.5÷85%,
x=50;
(2)3X×
=
,
2x=
,
2x÷2=
÷2,
x=
.
85%x=42.5,
85%x÷85%=42.5÷85%,
x=50;
(2)3X×
| 2 |
| 3 |
| 8 |
| 9 |
2x=
| 8 |
| 9 |
2x÷2=
| 8 |
| 9 |
x=
| 4 |
| 9 |
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