Answer:
employee worked 8 hours over 35 hours, for a total of 35 + 8 = 43 hours.
Explanation:
(35 hours x $15/hour) + (x hours x $22.50/hour) = $705 (where x is the number of hours worked over 35 hours)
You can then solve for x:
35x15 + x*22.50 = 705
525 + 22.5x = 705
22.5x = 180
x = 8
So the employee worked 8 hours over 35 hours, for a total of 35 + 8 = 43 hours.