SOLUTION: It takes 32 minutes for 9 people to paint 8 walls. How many minutes does it take 4 people to paint 6 walls?

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Question 895689: It takes 32 minutes for 9 people to paint 8 walls.
How many minutes does it take 4 people to paint 6 walls?
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
ONE person paints walls at the rate of r walls per minute.
If n is how many people, t for time in minutes, j for amount of jobs, then nr%2At=j.

9r%2A32=8 and 4r%2At=6.
Work with them. TWO variables, two equations. Solve for r from the first equation and substitute into the second equation and solve for t.