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x+2=8
x=8-2
x=6
b) 2y-2+3y-5y+2y=4
2y-2=4
2y=4+2
2y=6
y=3
2x+2x-3x-5+7=8
x+2=8
x=8-2
x=6
b)2y-2+3y-5y+2y=4
2y+3y-5y+2y-2=4
2y=4+2
2y=6|:2
y=3