Linear equations

Question

I have $28.50 a hot dog cost $1.25 each hamburger cost $2.50 and sodas cost $0.50 each. each person buys one soda they spend all $28.50 on the food and soda. write an equation that can determine the number of hot dogs x, and hamburgers,y,

Answer 1

You have three unknowns here: the number of hot dog, the number of hamburgers, and the number of sodas. You have the following equation:

28.50 = 1.25x + 2.50y + (.50)z

Three unknowns and just one equation. This cannot be solved without more information.