解方程. (1)2x+1=2-x; (2)5-3(x-1)=3; (3)2y−13=y+2/4−1; (4)y−y−12=2−y+2/6.

问题描述:

解方程.
(1)2x+1=2-x;                    
(2)5-3(x-1)=3;
(3)

2y−1
3
y+2
4
−1;
(4)y−
y−1
2
=2−
y+2
6

(1)移项合并得:3x=1,
解得:x=

1
3

(2)去括号得:5-3x+3=3,
移项合并得:3x=5,
解得:x=
5
3

(3)去分母得:8y-4=3y+6-12,
移项合并得:5y=-2,
解得:y=-
2
5

(4)去分母得:6y-3y+3=12-y-2,
移项合并得:4y=7,
解得:y=
7
4