题目内容
解方程
| 12.5+4x=21.7 | 13.5x-8.5x=20. |
(1)12.5+4x=21.7,
12.5+4x-12.5=21.7-12.5,
4x÷4=9.2÷4,
x=2.3;
(2)13.5x-8.5x=20,
5x=20,
5x÷5=20÷5,
x=4.
12.5+4x-12.5=21.7-12.5,
4x÷4=9.2÷4,
x=2.3;
(2)13.5x-8.5x=20,
5x=20,
5x÷5=20÷5,
x=4.
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