问题 解答题
解方程
(1)2x+5=5x-7                         
(2)3(x-2)=2-5(x-2)
(3)
y+2
4
-
2y-3
6
=1

(4)
4
3
[
3
4
(
1
5
x-2)-6]=1
答案

(1)2x-5x=-5-7,

-3x=-12,

x=4;                        

(2)3x-6=2-5x+10,

8x=18,

x=

9
4

(3)

y+2
4
-
2y-3
6
=1,

3(y+2)-2(2y-3)=12,

3y+6-4y+6=12,

-y=0,

y=0;

(4)

1
5
x-2-8=1,

1
5
x=11,

x=55.

单项选择题
单项选择题