5x + 8 (10-x) = 62. Write a practical problem and answer it

5x + 8 (10-x) = 62. Write a practical problem and answer it

When a person works for 5 hours, he can finish part of the work. If he works for 8 hours, his efficiency will drop. When he works for 8 hours, the average number that he can finish is 10, minus the average number of his 5 hours. When he works for 5 hours first, he has a rest, and then he works for 8 hours continuously, A total of 62 work loads have been completed. Ask this person what is the average work load when he works for 5 hours?
Answer: suppose the average workload of the person working 5 hours is X
The solution of the problem is: 5x + 8 (10-x) = 62
5X+80-8X=62
3X=80-62
3X=18
X=6
A: the average workload of this person working 5 hours is 6