题目内容
解方程
(1)
x=
(2)x÷
=
×
.
(1)
| 3 |
| 5 |
| 25 |
| 72 |
(2)x÷
| 5 |
| 9 |
| 3 |
| 16 |
| 4 |
| 5 |
考点:方程的解和解方程
专题:简易方程
分析:(1)方程两边同时除以
求解;
(2)首先计算方程右边,然后方程两边同时乘以
求解.
| 3 |
| 5 |
(2)首先计算方程右边,然后方程两边同时乘以
| 5 |
| 9 |
解答:
解:(1)
x=
x÷
=
÷
x=
;
(2)x÷
=
×
x÷
=
x÷
×
=
×
x=
.
| 3 |
| 5 |
| 25 |
| 72 |
| 3 |
| 5 |
| 3 |
| 5 |
| 25 |
| 72 |
| 3 |
| 5 |
x=
| 125 |
| 216 |
(2)x÷
| 5 |
| 9 |
| 3 |
| 16 |
| 4 |
| 5 |
x÷
| 5 |
| 9 |
| 3 |
| 20 |
x÷
| 5 |
| 9 |
| 5 |
| 9 |
| 3 |
| 20 |
| 5 |
| 9 |
x=
| 1 |
| 12 |
点评:本题运用等式的基本性质进行解答即可,注意等于号对齐.
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