Problem: A contractor estimated that one of his two bricklayers would take hours to build a certain wall and the other hours. However, he knew from experience that when they worked together, their combined output fell by bricks per hour. Being in a hurry, he put both men on the job and found that it took exactly hours to build the wall. The number of bricks in the wall was
Answer Choices:
A.
B.
C.
D.
E.
Solution:
If is the number of bricks in the wall, then this reduced number of bricks for hours of work together, is
bricks.