Arepair bill for your car is $553. the parts cost $265 the labor cost is $48 per hour. write and solve an equation to find the number of hours of labor spent repairing the car

Really all you need to do is write the addition equation and use n for an unknown number, and b for the total bill.

Your equation would be:  $553 + $265 + 48n = b

Or, simplified: $818 + 48n = b

An equation that can be used to find the number of labour hours is "265+48x=553." 

265 →  cost of the parts
48x → labour cost per hour
553 → total cost for repair bill

You can start to solve the equation by subtracting 265 from both sides so that "48x" is isolated.
265+48x=553
-265        -265

         48x=288

Divide 48 on both sides to find x.
48x=288

48     48
x=6

X is equal to 6, which then means that 6 hours of labour were spent repairing the car.