Question

3. Charlie needs to hire a plumber to fix his kitchen sink. ABC Plumbing charges a flat

fee of $50 plus 535 per hour, Pipes R Us charges a flat fee of $75 and $25 per hour.
How many hours will the two companies charge for the total cost to be equal?

Answer 1

2 hours

Explanation:

step one:

given

ABC Plumbing charges

flat fee=$50

charge per hour= $35------------------i want to assume you meant $35 and not $535

Pipes R Us charges

flat fee=$75

charge per hour= $25

Let the number of hours be x

the equation for the charges is given bellow

y=35x+50----------1

y=25x+75-----------2

equating 1 and 2

35x+50=25x+75

35x-25x=75-50

10x=20

divide both sides by 10

x=20/10

x=2 hours

2 hours