Answer: 10 hours
Step-by-step explanation:
Given
Slow fix auto charge $28 for parts and $48 per hour of labor
We work charge $59 for parts and $44.90 per hour of labor
Suppose both works for x hours
Cost of Slow fix= [tex]\$(28+48x)[/tex]
Cost of We work= [tex]\$(59+44.90x)[/tex]
When these costs are the same
[tex]28+48x=59+44.90x\\3.1x=31\\x=10\ hours[/tex]
