Question

Solve using rational equations:

James, Kelly, Hector, and Kyla are painting a house. James could paint the house in 9 hours, Kelly could paint it in 7 hours, Hector could paint it in 6 hours, and Kyla could paint it in 10 hours. How long will it take them to paint it together?

Answer 1

(1/9+1/7+1/6+1/10)*x=1
x=315/164 hour
Answer: It takes 315/164 hours.

Answer 2

10+6+7+9=32

32 hours for painting