题目内容
解方程.
-
x=
x-5
=2
.
| 9 |
| 4 |
| 1 |
| 4 |
| 3 |
| 8 |
| 8 |
| 11 |
| 1 |
| 3 |
| 2 |
| 3 |
考点:方程的解和解方程
专题:简易方程
分析:(1)根据等式的性质在方程两边同时加
x,再同时减
,最后同时除以
求解.
(2)根据等式的性质在方程两边同时加5
,再同时除以
求解.
| 1 |
| 4 |
| 3 |
| 8 |
| 1 |
| 4 |
(2)根据等式的性质在方程两边同时加5
| 1 |
| 3 |
| 8 |
| 11 |
解答:
解:(1)
-
x=
-
x+
x=
+
x
-
=
+
x-
÷
=
x÷
x=
(2)
x-5
=2
x-5
+5
=2
+5
x÷
=8÷
x=11
| 9 |
| 4 |
| 1 |
| 4 |
| 3 |
| 8 |
| 9 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 3 |
| 8 |
| 1 |
| 4 |
| 9 |
| 4 |
| 3 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
| 3 |
| 8 |
| 15 |
| 8 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
x=
| 15 |
| 2 |
(2)
| 8 |
| 11 |
| 1 |
| 3 |
| 2 |
| 3 |
| 8 |
| 11 |
| 1 |
| 3 |
| 1 |
| 3 |
| 2 |
| 3 |
| 1 |
| 3 |
| 8 |
| 11 |
| 8 |
| 11 |
| 8 |
| 11 |
x=11
点评:本题主要考查了学生根据等式的性质解方程的能力,注意等号对齐.
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