Question

10. Mac the plumber charges $80 for a house call plus

$35 per hour. Jack, the other plumber, charges $55
per hour. How many hours would a job have to take
for the cost to be equal

Answer 1

4 hours

Explanation:

55h = 80 + 35h

55h - 35h = 80 + 35h - 35h

20h = 80

20h/20 = 80/20

h = 4