answer: x = 7/2 y = 7/4
first u need to choose a variable. i’ll choose x because it’s easy to isolate.
x + y = 3y
x = 2y
substitute:
2x + 4y = 14
2(2y) + 4y = 14
4y + 4y = 14
8y = 14
y = 7/4
then u can find x by substituting back in
2x + 4y = 14
2x + 4(7/4) = 14
2x + 7 = 14
2x = 7
x = 7/2
answer:
y = 7/4
x = 7/2
hope this helps :)