题目内容
与方程x-
=
的解相同的是( )
| 1 |
| 4 |
| 1 |
| 2 |
A、
| ||||||
B、4+
| ||||||
C、x+
|
分析:先根据等式的性质,求出方程x-
=
的解,再分别求出选项中各个方程的解,进行比较,据此解答.
| 1 |
| 4 |
| 1 |
| 2 |
解答:解:x-
=
,
x-
+
=
+
,
x=
;
A、
x+
x=
,
x=
,
x×
=
×
,
x=
,
B、4+
x=
,
4+
x-4=
-4,
x×
=
×
,
x=
,
C、x+
=
,
x+
-
=
-
,
x=
.
故选:B.
| 1 |
| 4 |
| 1 |
| 2 |
x-
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
x=
| 3 |
| 4 |
A、
| 3 |
| 8 |
| 1 |
| 2 |
| 1 |
| 4 |
| 7 |
| 8 |
| 1 |
| 4 |
| 7 |
| 8 |
| 8 |
| 7 |
| 1 |
| 4 |
| 8 |
| 7 |
x=
| 2 |
| 7 |
B、4+
| 2 |
| 3 |
| 9 |
| 2 |
4+
| 2 |
| 3 |
| 9 |
| 2 |
| 2 |
| 3 |
| 3 |
| 2 |
| 1 |
| 2 |
| 3 |
| 2 |
x=
| 3 |
| 4 |
C、x+
| 1 |
| 3 |
| 3 |
| 5 |
x+
| 1 |
| 3 |
| 1 |
| 3 |
| 3 |
| 5 |
| 1 |
| 3 |
x=
| 4 |
| 15 |
故选:B.
点评:本题主要是根据等式的性质,分别求出方程的解,从而确定哪两个方程的解相同.
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