解下列方程: (1)4x+3=2(x-1)+1; (2)x−13−x+2/6=4−x2; (3)5y+2=7y-8; (4)2x+5y=122x+3y=6.; (5)3x−2y=46y=3−5x.

问题描述:

解下列方程:
(1)4x+3=2(x-1)+1;           
(2)

x−1
3
x+2
6
4−x
2

(3)5y+2=7y-8;               
(4)
2x+5y=12
2x+3y=6.

(5)
3x−2y=46
y=3−5x

(1)去括号得:4x+3=2x-2+1,移项合并得:2x=-4,解得:x=-2;(2)去分母得:2x-2-x-2=12-3x,移项合并得:4x=16,解得:x=4;(3)移项合并得:2y=10,解得:y=5;(4)2x+5y=12①2x+3y=6②,①-②得:2y=6,即...