If John can paint the house in 6 hours, then the part he can do in 1 hour is .
Let x = the number of hours it takes them to paint the house together.
If together they can paint the house in "x" hours, then in 1 hour they can paint of the house.
The equation is "The part Sally can paint in 1 hour + the part that John can paint in 1 hour equals the part they can paint together in 1 hour."
Multiply both sides of the equation by the least common denominator which is .
hours or 2.4 hours.
