Problema Solution
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 provided by our tutors
Let
x = the money spent of CDs, x>0
2x = the money spent of sheet music
the total amount of money that she spent for sheet music and CDs was one third of her monthly music budget of $189:
x + 2x = (1/3)*189
........
........
x = $21
2x = 2*21 = $41
Mrs. Perrin spent $41 on sheet music.