题目内容
求未知数X
x:
=
x-
x=
.
x:
| 7 |
| 12 |
| 3 |
| 14 |
| 3 |
| 4 |
| 2 |
| 3 |
| 5 |
| 6 |
考点:方程的解和解方程
专题:简易方程
分析:(1)根据比与除法的关系,把原式改写成x÷
=
,然后等式的两边同时乘
即可;
(2)先计算
x-
x=
x,然后等式的两边同时除以
即可.
| 7 |
| 12 |
| 3 |
| 14 |
| 7 |
| 12 |
(2)先计算
| 3 |
| 4 |
| 2 |
| 3 |
| 1 |
| 12 |
| 1 |
| 12 |
解答:
解:(1)x:
=
x÷
=
x÷
×
=
×
x=
;
(2)
x-
x=
x=
x÷
=
÷
x=10.
| 7 |
| 12 |
| 3 |
| 14 |
x÷
| 7 |
| 12 |
| 3 |
| 14 |
x÷
| 7 |
| 12 |
| 7 |
| 12 |
| 3 |
| 14 |
| 7 |
| 12 |
x=
| 1 |
| 8 |
(2)
| 3 |
| 4 |
| 2 |
| 3 |
| 5 |
| 6 |
| 1 |
| 12 |
| 5 |
| 6 |
| 1 |
| 12 |
| 1 |
| 12 |
| 5 |
| 6 |
| 1 |
| 12 |
x=10.
点评:本题主要考查解方程,根据等式的性质进行解答即可.
练习册系列答案
相关题目