答案
解:(1)去分母得:2(2x+1)-(5x-1)=6,
去括号得:4x+2-5x+1=6,
移项合并得:-x=3,
解得:x=-3;
(2)去分母得:6-2(x+2)=3(x-1),
去括号得:6-2x-4=3x-3,
移项合并得:5x=5,
解得:x=1;
(3)去分母得:5(x-3)-2(4x+1)=10,
去括号后得:5x-15-8x-2=10,
移项合并得:-3x=27,
解得:x=-9;
(4)去分母得:77y+18=14y-45,
移项合并得:63y=-63,
解得:y=-1;
(5)去分母得:6(x-2)-3(x+3)-10(2x-5)+90=0,
去括号得:6x-12-3x-9-20x+50+90=0,
移项合并得:-17x=119,
解得:x=-7;
(6)去分母得:4(5x+1)=3(9x+1)-8(1-x),
去括号得:20x+4=27x+3-8+8x,
移项合并得:15x=9,
解得:x=
.
解:(1)去分母得:2(2x+1)-(5x-1)=6,
去括号得:4x+2-5x+1=6,
移项合并得:-x=3,
解得:x=-3;
(2)去分母得:6-2(x+2)=3(x-1),
去括号得:6-2x-4=3x-3,
移项合并得:5x=5,
解得:x=1;
(3)去分母得:5(x-3)-2(4x+1)=10,
去括号后得:5x-15-8x-2=10,
移项合并得:-3x=27,
解得:x=-9;
(4)去分母得:77y+18=14y-45,
移项合并得:63y=-63,
解得:y=-1;
(5)去分母得:6(x-2)-3(x+3)-10(2x-5)+90=0,
去括号得:6x-12-3x-9-20x+50+90=0,
移项合并得:-17x=119,
解得:x=-7;
(6)去分母得:4(5x+1)=3(9x+1)-8(1-x),
去括号得:20x+4=27x+3-8+8x,
移项合并得:15x=9,
解得:x=
.