just add them
4y = 28
y = 7
sub back into the 2nd
x - y = 15
x - 7 = 15
x = 22
-x+5y=13
x-y=15
(solve by using elimination)
1 answer
x-y=15
(solve by using elimination)
1 answer
2 answers
1 answer
2 answers
1 answer