Answer:
780 = 180 + 40x
Explanation:
first we need to isolate the variable
780-180 = 180-180 + 40x
600 = 40x
600/40 = 40x/40
15=x
so the unit rate or rate per hour Mr. Harris earns is $15 per hour
Hope this helps!
1.6m questions
2.0m answers