Jack bought a total of 40 pens and markers. He paid $60 for ...

Let's assume the number of markers is and the number of pens is .

Step 1: Set up equations based on the quantity

We know that the total number of pens and markers is , so we have the equation:

Step 2: Set up equations based on the cost and price relationship

Let the cost of each marker be dollars. Then the cost of each pen is dollars.

He paid 40 for the markers, and since the number of markers is and the cost per marker is , we have the equation , which implies .

Substitute into , we get .

Substitute into :

$...$

Algebra-2