Divide the numerator by the denominator.
Write down the whole number answer.
Then write down any remainder above the denominator.
This expression is factored completely. However, if we foil, we can make it to it's original expression.
When you foil, you get:

Simplify.

C=25x+75 would be the equation
Step-by-step explanation:
75 dollars is the flat out fee right away and the 25 is for how many hours spent fixing the drain
36/63 in its simplest form is 4/7
Have a great day! =)