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3(y+1)-4=2y-5
3y+3-4=2y-5 /-2y
3y-2y-1=-5 /+1
y=-5+1
y=-4
3x-2y=-5+4
3x-2y=-1
3(y+1)-2y=-1
3y-3-2y=-1
y=-1+3
y=2
3y-9=x+3 2x=5x-4y
3y-x=3+9
3y-x=12 /*2
6y-2x=24
6y-2(5x-4y)=24
6y-10x+8y=24
14y-10x=24