解方程：x×35=20×1425%+10x=4545×14-12x=120
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（1）x×
=20×
x×
=5
x×
÷
=5÷
X=
（2）25%+10x=
25%+10x-25%=
-25%
10x=
10x÷10=
÷10
X=
（3）
×
-
X=
-
X=
-
X+
X=
+
X
=
+
X
+
| 3 |
| 5 |
| 1 |
| 4 |
x×
| 3 |
| 5 |
x×
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
X=
| 25 |
| 3 |
（2）25%+10x=
| 4 |
| 5 |
25%+10x-25%=
| 4 |
| 5 |
10x=
| 11 |
| 20 |
10x÷10=
| 11 |
| 20 |
X=
| 11 |
| 200 |
（3）
| 4 |
| 5 |
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 20 |
| 1 |
| 5 |
| 1 |
| 2 |
| 1 |
| 20 |
| 1 |
| 5 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 20 |
| 1 |
| 2 |
| 1 |
| 5 |
| 1 |
| 20 |
| 1 |
| 2 |
| 1 |
| 20 |
| 1 |
| 2 |
