问题 解答题
(1)计算:(1)(-4)3-4×(-
1
2
2
(2)化简:2x-(3x-
x-1
2
)+[5x-
3
2
(x-2)]
(3)解方程:y-
1
2
=
1
2
y-2.
答案

(1)(-4)3-4×(-

1
2
2

=-64-1

=-65;

(2)2x-(3x-

x-1
2
)+[5x-
3
2
(x-2)]

=2x-3x+

x-1
2
+5x-
3
2
x+3

=3x+

5
2

(3)y-

1
2
=
1
2
y-2

1
2
y=-
3
2

∴y=-3.

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