Question

Lauren needed to get her computer fixed. She took it to the repair store. The

technician at the store worked on the computer for 3.75 hours and charged her $119
for parts. The total was $400.25. Write and solve an equation which can be used to
determine a, the cost of the labor per hour.

Answer 1

3.75x + $119 = $400.25

x = $75

Explanation:

Lauren needed to get her computer fixed. She took it to the repair store. The technician at the store worked on the computer for 3.75 hours and charged her $119 for parts. The total was $400.25. Write and solve an equation which can be used to determine a, the cost of the labor per hour.

3.75x + parts = $400.25

so:

3.75x + $119 = $400.25

subtract $119 from both sides:

3.75x + $119 - $119 = $400.25 - $119

3.75x = $281.85

divide both sides by 3.75

3.75x/3.75 = $281.85/3.75

x = $75

so the tech charged $75 per hour.