Answer:
I think is 11.4
.........
30 - 11 = 19 19 CD's
Step-by-step explanation:
x = 9
y = 3
2x + 2y = 24 is the same as x + y = 12
using substitution, x = 12-y
12 - y = 3y
12 = 4y
x = 3(3)