题目内容
解方程.
x-
=
x÷
=8.
| 5 |
| 7 |
| 3 |
| 5 |
| 1 |
| 5 |
| 3 |
| 4 |
| 1 |
| 6 |
考点:方程的解和解方程
专题:简易方程
分析:(1)根据等式的性质,两边同加上
,再同乘
即可;
(2)根据等式的性质,两边同乘
,再同乘
即可.
| 3 |
| 5 |
| 7 |
| 5 |
(2)根据等式的性质,两边同乘
| 1 |
| 6 |
| 4 |
| 3 |
解答:
解:(1)
x-
=
x-
+
=
+
x=
x×
=
×
x=
(2)
x÷
=8
x÷
×
=8×
x=
x×
=
×
x=
| 5 |
| 7 |
| 3 |
| 5 |
| 1 |
| 5 |
| 5 |
| 7 |
| 3 |
| 5 |
| 3 |
| 5 |
| 1 |
| 5 |
| 3 |
| 5 |
| 5 |
| 7 |
| 4 |
| 5 |
| 5 |
| 7 |
| 7 |
| 5 |
| 4 |
| 5 |
| 7 |
| 5 |
x=
| 21 |
| 25 |
(2)
| 3 |
| 4 |
| 1 |
| 6 |
| 3 |
| 4 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 6 |
| 3 |
| 4 |
| 4 |
| 3 |
| 3 |
| 4 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
x=
| 16 |
| 9 |
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“=”上下要对齐.
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