1. Solve the following problem.
2. Please follow the steps given to solve the problem.
a. Understand the Problem (What is asked and what are given?)
b. Write the equation (Write the mathematical sentence of the problem)
c. Solve the equation (Show the complete solution)
d. Final answer (Give the correct answer with unit of measure, and make a necessary conclusion)
3. Please be guided by the rubric for grading below.

WORK PROBLEM
A homeowner estimates that it will take him 12 days to roof his house. A professional roofer estimates that e could roof the house in 4 days. How long will it take if the homeowner helps the roofer?​