Posted by mo on .
A grocer mixes a premium blend of coffee worth $17/kg with a coffee blend worth #7/kg. A mixture of 36 kg worth $11/kg is produced. How many kilograms of each type of coffee are included in the mixture?

math 
Reiny,
amount of premium coffee  x
amount of cheaper coffee  36x
17x + 7(36x) = 11(36)
solve for x