Answer: the electrician's hourly labor rate is $25
Step-by-step explanation:
Let x represent the electrician's hourly labor rate.
The electrician charges a $40 dollar fee to make a house call plus an hourly rate for labor. This means that the total bill for a job that takes y hours would be
xy + 40
If the total bill for a job that takes 2 hours comes to $99, it means that
2x + 40 = 90
2x = 90 - 40
2x = 50
x = 50/2
x = 25
