Question

Cora works as a plumber and earns $50 per house call, plus $18 for every hour of work. She billed a customer $104, but forgot how long she worked. To solve for the number of hours, she subtracted 50 from 104 and then divided by 18.

Answer 1

Cora worked 3 hours

Explanation:

104 = 18x + 50 ( x = # of hours worked)

54 = 18x ( subtracted 50 from both sides)

3 = x ( divided both sides by 18)