Mike and kim invest $18,000 in equipment to print yearbooks for schools. each yearbook costs $5 to print and sells for $30. how many yearbooks must they sell before their business breaks even?

This is a simple equation since they get 30$ and it costs  5$ that means they make 25$ each yearbook. Then you divide 18,000 by 25 and get 720

They have to sell 720 yearbooks :) hope this helped

Y=-3x is the correct answer