{ 3/4x + 2/3y = 7

{ 3/5x - 1/2y = 18

I'm suppose to find out what x and y are.

the answer from the book is:

(20,-12)

I think my problem here is trying to take the fractions and turn them into regular numbers. Maybe that's not what I need to do. I did this problem a few times and I got these whacked out, far fetched answers for x and y so I gave up.

I probably am missing something and solving this is simpler than I think.

I'm guessing the substitution "injection" method would be used here.