It costs $0.50 to download an individual song and $4 to download an album. Jada has $15 to spend downloading music. Write an equation relating the number of individual songs ss and the number of albums aa Jada can download.

It costs $0.50 to download an individual song and $4 to download an album. Jada has $15 to spend downloading music.

Write an equation relating the number of individual songs ss and the number of albums aa Jada can download.

.5s + .4a = 1.5

15 = -5s + 4a

.5s + 4a = 15

15 = 4a - 5s