Question

Amelia needed to get her computer fixed. She took it to the repair store. The technician at the store worked on the computer for 2.5 hours and charged her $100 for parts. The total was $237.50. Write and solve an equation which can be used to determine xx, the cost of the labor per hour.

Answer 1

Let x = cost of labor per hour. Equation:
2.5x + 100 = 237.50

Solve:
2.5x = 237.50 − 100 = 137.50
x = 137.50 / 2.5 = 55

So the labor costs $55 per hour.