PART A
WT = 30
30 = 3HF + 2FA
30 = 3x + 2y
2y = 30 - 3x
y = 15 - 3/2x
0 = 15 - 3/2x
3/2x = 15
x or EH = 10
y = 15 - 3/2(10)
y = 15 - 15
y or FA = 0
Okay so this problem doesn't make sense because FA cannot = 0. I know I did the first part right - change of variables. I'm just not sure if we can use the information in part b to answer part a... Anyway, I hope this helps!