Answer :
y=4x-9
y=x-3
(x-3)=4x-9 -- add 9 to both sides and subtract x from both sides
3x=6
x=2
y=2-3
y=-1
y=x-3
(x-3)=4x-9 -- add 9 to both sides and subtract x from both sides
3x=6
x=2
y=2-3
y=-1