SOLUTION: A shopkeeper has two types of coffee beans on hand. One type sells for $3.20 per lb, the other for $7.80 per lb. How many pounds of the $3.20 per lb coffee beans must be used in th

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A shopkeeper has two types of coffee beans on hand. One type sells for $3.20 per lb, the other for $7.80 per lb. How many pounds of the $3.20 per lb coffee beans must be used in th      Log On


   

Question 290176: A shopkeeper has two types of coffee beans on hand. One type sells for $3.20 per lb, the other for $7.80 per lb. How many pounds of the $3.20 per lb coffee beans must be used in the mixture to produce 80 lbs of a blend that sells for $5.04 per lb?
Round your answer to 2 decimal places.



Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
(3.2*x)+(7.8*y)=(80)*5.04
x+y=80
x=48 y=32