题目内容
(1)计算:(1)(-4)3-4×(-
)2
(2)化简:2x-(3x-
)+[5x-
(x-2)]
(3)解方程:y-
=
y-2.
| 1 |
| 2 |
(2)化简:2x-(3x-
| x-1 |
| 2 |
| 3 |
| 2 |
(3)解方程:y-
| 1 |
| 2 |
| 1 |
| 2 |
(1)(-4)3-4×(-
)2
=-64-1
=-65;
(2)2x-(3x-
)+[5x-
(x-2)]
=2x-3x+
+5x-
x+3
=3x+
;
(3)y-
=
y-2
∴
y=-
,
∴y=-3.
| 1 |
| 2 |
=-64-1
=-65;
(2)2x-(3x-
| x-1 |
| 2 |
| 3 |
| 2 |
=2x-3x+
| x-1 |
| 2 |
| 3 |
| 2 |
=3x+
| 5 |
| 2 |
(3)y-
| 1 |
| 2 |
| 1 |
| 2 |
∴
| 1 |
| 2 |
| 3 |
| 2 |
∴y=-3.
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