line 1...3x-4y=7(2x-y) become 3x-4y=14x-7y...14x-3x=7y-4y...11x=3y...x=(3/11)y
line 2...5x-3y=-3...5x=3y-3...x=(3/5)*(y-1)
(3/5)*(y-1)=(3/11)y
(33/5)*(y-1)=3y...(33/5)y -(33/5)-3y=0
[(33/5)-3]y=(33/5) or (6.6-3)y=6.6
3.6y=6.6....y=6.6/3.6=1.8333333333333333...
from line 2... 5x=3y-3=5.5-3=2.5
x=2.5/5=0.5