
Lauren H. answered 01/11/19
Tutor
4.8
(24)
Experienced High School Chemistry Teacher
x + y = 17 , y = 17 - x
2x + 4y = 52
These equations are correct. There are two approaches: 1) use substitution, or, 2) solve equations simultaneously.
I will use substitution:
2x + 4(17 - x) = 52
2x + 68 - 4x = 52
-2x = -16
x = 8
y = 9