Answer: equation = $600 + tx$8 = $640 ; t = 5 additional hours in May
Step-by-step explanation:
Equation = $600 + tx$8/hour = $640
t = ($640 - $600)/$8/hour
t = $40/$8/hour = 5 hours
Answer: Equation = $600 + tx$8 = $640 ; t = 5 additional hours in May