1
(1)5x+10=10x-2
10+2=10x-5x
12=5x
x=12/5
(2)x+1-2x+2=1-3x
x-2x+3x=1-1-2
x=-1
(3)2x-4-4x+1=3-3x
2x+3x-4x=3+4-1
x=6
2
(1)3(2-x)=2(3+x)
6-3x=6+2x
x=0
(2)2(3y+4)-5(2y-7)=3
6y+8-10y+35=3
y=10
1
(1)5x+10=10x-2
10+2=10x-5x
12=5x
x=12/5
(2)x+1-2x+2=1-3x
x-2x+3x=1-1-2
x=-1
(3)2x-4-4x+1=3-3x
2x+3x-4x=3+4-1
x=6
2
(1)3(2-x)=2(3+x)
6-3x=6+2x
x=0
(2)2(3y+4)-5(2y-7)=3
6y+8-10y+35=3
y=10