Solve Real-World System Problems Practice Test

A class is buying notebooks and pens. Notebooks cost $3 each and pens cost $1 each. The class buys 24 items total and spends $52. Let $n$ be the number of notebooks and $p$ be the number of pens. Which system correctly represents the situation?

A rectangle has perimeter 40 cm. Its length is 3 cm more than its width. Let $l$ be the length and $w$ be the width. Solve the system to find the dimensions of the rectangle.