题目内容
已知方程(5-
)x=2,则方程的解为( )
7 |
A.x=-1 | B.x=
| C.x=
| D.x=-5-
|
∵(5-
)x=2,
x=
=
=
.
故选C.
7 |
x=
2 | ||
5-
|
2(5+
| ||||
(5-
|
5+
| ||
9 |
故选C.
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题目内容
7 |
A.x=-1 | B.x=
| C.x=
| D.x=-5-
|
7 |
2 | ||
5-
|
2(5+
| ||||
(5-
|
5+
| ||
9 |