SOLUTION: In a class of 100, 1/8 of the boys and 1/4 of the girls play piano, and 3 times as many girls as boys play piano. How many boys play piano?

Question 981639: In a class of 100, 1/8 of the boys and 1/4 of the girls play piano, and 3 times as many girls as boys play piano. How many boys play piano?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = number of girls in class
= numbr of boys in class
------------------
given:
(1)
-----------------------------------
Multiply both sides by
(1)
(1)
(1)
(1)
and

There are 40 boys in the class

5 boys play piano
------------------
check:
Three times as many girls play piano, so
girls play piano
This is 1/4 of the girls, so there are
girls in the class
OK

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