are we solving???
if so, then just subtract them
4x = 3
x = 1
sub into the second
-1 + y = 1
y = 2
2x+y=4
-x+y=1
2 answers
bring x to the other side in -x + y=1 so that you will get the equation y=x + 1 plug x +1 in for y in the first equation and solve for x and then plug that answer into either equation for x to solve for y