Problema Solution
Craig and Cindy together can clean a house in 9 hours. Working alone Cindy takes 3 times as long as Craig. How long does it take Craig to clean the house alone?
Answer provided by our tutors
9/(3x) + 9/x = 1
3/x + 9/x = 1
12/x = 1
x = 12
Craig alone can clean a house in 12 hours --> final answer
Cindy cleans the house alone in 36 hours