Question

two people can paint a house in 21 hours. working individually one of the people can paint the house in 6 hours more than it takes the other person to paint the house. how tong would it take each person working individually to paint the house

Answer 1

If frist person take X hours

Second person will take (X+6) hours

Equations:

X+(X+6)= 21×2

2X= 42-6

X= 36/2

X=18