Story Problem

Some friends are recording songs on a CD. The first 1/5 of the CD has Alex's songs.The next 12 minutes of songs are Henrique's. 1/3 of the time is Brian's songs. Sally has 32 minuites. How many minutes of music are there in all?

5 answers

If we add up everybody's time, we should get the total time of the CD.
Let M represent the total time of the CD. Everything will be in minutes.

M= (1/5)*M + 12 + (1/3)*M + 32
Combining terms...
(1 - 1/5 - 1/3)*M=44
Solve for M
Thank you. We came up with 94 2/7 which is approximately 94mins, 17 secs.
Good!
That is what I got, also.
the quotient of eight and twice a number
I need help withrational numbers