Lia gets paid $45 an hour plus $150 each week. She hopes to earn at least $690 this week.

Assuming the question is:

"How many hours does she have to work to reach her goal of $690"

That information can make the equation:

money earned in a week = 45h + 150

We then sub in $690

690 = 45h + 150

Rearrange to find h

540 = 45h

12 = h

Lia has to work 12 hours to earn at least $690