prealgebra..7th grade
posted by pam on .
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?

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