Given:
A roofer earns $25 per hour for regular hours worked and $30 per hour for overtime hours worked. He puts in 40 hours of regular time during a certain week and he wishes to earn $1140.
Required:
To find how many hours of overtime should he work.
Step-by-step explanation:
Let he should work x hours overtime.
Then the equation becomes:

He should work approximately 5 hours.
Final Answer:
He should work approximately 5 hours overtime.