A newspaper charges $50 per half-page ad and $80 per full-page ad. Gavin has a budget of $750 to purchase 12 advertisements.
Define a variable for each unknown. Write a system of equations to represent the situation.

How many half-page advertisements does Gavin purchase? Show your work.

How many full-page advertisements does Gavin purchase? Show your work. (no links please, and no nonsense answers)