题目内容
| 解方程 40%x-
|
3+0.2)x=
|
考点:方程的解和解方程
专题:简易方程
分析:(1)原式变为
x-
=
,根据等式的性质,两边同加上
,再同乘
即可;
(2)原式变为
x=
,根据等式的性质,两边同乘
即可.
| 2 |
| 5 |
| 1 |
| 4 |
| 7 |
| 12 |
| 1 |
| 4 |
| 5 |
| 2 |
(2)原式变为
| 16 |
| 5 |
| 1 |
| 10 |
| 5 |
| 16 |
解答:
解:(1)40%x-
=
x-
=
x-
+
=
+
x=
x×
=
×
x=
(2)(3+0.2)x=
x=
x×
=
×
x=
| 1 |
| 4 |
| 7 |
| 12 |
| 2 |
| 5 |
| 1 |
| 4 |
| 7 |
| 12 |
| 2 |
| 5 |
| 1 |
| 4 |
| 1 |
| 4 |
| 7 |
| 12 |
| 1 |
| 4 |
| 2 |
| 5 |
| 5 |
| 6 |
| 2 |
| 5 |
| 5 |
| 2 |
| 5 |
| 6 |
| 5 |
| 2 |
x=
| 25 |
| 12 |
(2)(3+0.2)x=
| 1 |
| 10 |
| 16 |
| 5 |
| 1 |
| 10 |
| 16 |
| 5 |
| 5 |
| 16 |
| 1 |
| 10 |
| 5 |
| 16 |
x=
| 1 |
| 32 |
点评:此题考查了根据等式的性质解方程,即等式两边同加上、同减去、同乘上或同除以一个不为0的数,等式仍相等.同时注意“=”上下相对齐.
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