`1)-2(x-1)+3(2-x)=4(x+2)`
`⇔-2x+2+6 -3x=4x+8`
`⇔-5x+8=-4x+8`
`⇔-5x-4x=-8+8`
`⇔-9x=0`
`⇔x=0`
`->` Vậy `S={0}`
`2) 3(-x+2)-3(2-x)=-1(x+3)`
`⇔-3x+6-6+3x=-x-3`
`⇔0=-x-3`
`⇔x=0+(-3)`
`⇔x=-3`
`->` Vậy `S={-3}`
`3) -2(2-x)-3(1+x)=4(2-3x)`
`⇔-4+2x-3-3x=8-12x`
`⇔-7-x=8-12x`
`⇔-x+12x=8+7`
`⇔11x=15`
`⇔x=15:11`
`⇔x=15/11`
`->` Vậy `S={15/11}`