1) 2y-y=-3-2, y=-5
2)1.3x=6.5-0.5+0.7 1.3x=6+0.7 1.3x=6.7 x=5.2
3) 3x+4x-6x=7-2 7x-6x=5 x=5
4)x+0.25x=13-2 1.25x=11 x=8.8
1 . 2y+3=y-2
解:2y-y=-2-3
y=-5
2 . 0.5-0.7=6.5-1.3x
解:-6.5-0.2=-1.3x
-6.7=-1.3x
x=67/13
3 . 3x-7+4x=6x-2
解: 7x-7=6x-2
x=5
4 . -0.75x+2=13-0.25x………………………………两边同时乘4
解: -3x+8=52-x
-2x=44
x=-22
1) 2y+3=y-2 => 2y-y=-2-3 => y=-5
2)0.5-0.7=6.5-1.3x => 1.3x=6.5+0.2 => x=67/13
3)3x-7+4x=6x-2 => 7x-6x=-2+7 => x=5
4)3/4*x+2=13-1/4*x => 3/4*x+1/4*x=13-2 => x=11
1 . 2y+3=y-2
解:2y-y=-2-3
y=-5
2 . 0.5-0.7=6.5-1.3x
解:-6.5-0.2=-1.3x
-6.7=-1.3x
x=67/13
3 . 3x-7+4x=6x-2
解: 7x-7=6x-2
x=5
4 . (-0.75x+2)×4=(13-0.25x4)×4
解: -3x+8=52-x
-2x=44
x=-22
1. 移项,得,2y-y=-2-3
合并同类型,得y=-5