Question

mrs. perrin, the school music teacher, spent twice as much money on sheet music as she did on cds. the total amount of money that she spent for sheet music and cds was one third of her monthly music budget of $189. how much money did mrs. perrin spend on sheet music?

Answer 1

Let sheet music be s.  Let cds be c.

s = 2c      .......(i)

s + c = (1/3)*(189)

s + c = 63    .......(ii)

Recall s = 2c

s + c = 63
2c + c = 63
3c = 63
c = 63/3
c = 21

s = 2c = 2*21= 42

She spent $42 on sheet music.