Question

A computer repairman charges an initial fee of $100 plus an hourly fee of $75.

Mr. Billings paid the repairman $475. How many hours did the repairman work?

Answer 1

475 - 100 = 75x
Subtract 100 from the 475
375 = 75x
Divide both side w 75 . The 75 on the X side cancels out
375/ 75 = 5
X= 5

Answer 2

The repairman worked 5hours

Explanation:

Initial fee = $100

Charge per hour = $75

This simply implies that the repairman charges $100 and charge 75 for every hour worked.

Initial fee = $100

Charge per hour = $75

To find the hours work when his total work fee is 475, we should understand that,

Total work fee = initial fee + total charges

Total charges = charge per hour * hour worked.

Total work fee = initial free + (charge per hour * hour worked.)

475 = 100 + 75*h

Collect like terms

75h = 475 - 100

75h = 375

Divide both side by 75 .

75h/75 = 375/75

h = 5.

Since h represent hour work by the repairman.

The repairman worked 5hours