Coffee Mixture Problem - in {cheap, expensive} coffee space

A coffee shop wishes to prepare 24 lbs of coffee by blending cheap coffee that sells for $ 5/lb and more expensive coffee that sells for $ 10/lb.[br][br]If they want to sell the the blended coffee for a total of $200, how many pounds of each type of coffee should they use?

Information: Coffee Mixture Problem - in {cheap, expensive} coffee space