An auto repair bill was $563. This includes $188 for parts and $75 for each hour of labor. Find the

An auto repair bill was $563. This includes $188 for parts and $75 for each hour of labor. Find the number of hours of labor

Let the number of hours of labor be h. We have the cost function C(h):
C(h) = Hourly Labor Rate * h + parts

Given 188 for parts, 75 for hourly labor rate, and 563 for C(h), we have:
75h + 188 = 563

To solve this equation for h, we type it in our search engine and we get:
h = 5