(1)去括号得:-12+3x=12,
移项合并得:3x=24,
解得:x=8;
(2)去分母得:6x-3(x-1)=12-2(x+2),
去括号得:6x-3x+3=12-2x-4,
移项合并得:5x=5,
解得:x=1;
(3)方程变形得5x+5-
=1,10x?40 7
去分母得:35x+35-10x+40=7,
移项合并得:25x=-68,
解得:x=-
;68 25
(4)方程变形得:x-5=2或x-5=-2,
解得:x=7或3;
(5)移项合并得:5x=5,
解得:x=1;
(6)去括号得:12x-18-8x+12=-6x+9,
移项合并得:10x=15,
解得:x=1.5.