Colin bought 2 books and 3 pens for $11, Una bought 1 book and 1 pen for $5.How much did each book and each pen cost

Question

need help question on my exam

Answer 1

This is a system of equations.

Let b=books and p=pens

 

2 books + 3 pens will cost $11, so 3b+2p=11

1 book + 1 pen will cost $5, so 1b+1p=5

 

Now solve this system eiher by elimiation or substitution.