题目内容
解方程.
x-
=
x+
x=
.
| 2 |
| 5 |
| 2 |
| 3 |
| 4 |
| 9 |
| 4 |
| 15 |
| 3 |
| 5 |
| 26 |
| 9 |
分析:(1)根据等式的性质,在方程两边同时加上
,再乘上
求解,
(2)先化简,再根据等式的性质,在方程两边同时乘上
求解.
| 2 |
| 3 |
| 5 |
| 2 |
(2)先化简,再根据等式的性质,在方程两边同时乘上
| 15 |
| 13 |
解答:解:(1)
x-
=
,
x-
+
=
+
,
x×
=
×
,
x=2
;
(2)
x+
x=
,
x=
,
x×
=
×
,
x=3
.
| 2 |
| 5 |
| 2 |
| 3 |
| 4 |
| 9 |
| 2 |
| 5 |
| 2 |
| 3 |
| 2 |
| 3 |
| 4 |
| 9 |
| 2 |
| 3 |
| 2 |
| 5 |
| 5 |
| 2 |
| 10 |
| 9 |
| 5 |
| 2 |
x=2
| 7 |
| 9 |
(2)
| 4 |
| 15 |
| 3 |
| 5 |
| 26 |
| 9 |
| 13 |
| 15 |
| 26 |
| 9 |
| 13 |
| 15 |
| 15 |
| 13 |
| 26 |
| 9 |
| 15 |
| 13 |
x=3
| 1 |
| 3 |
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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