posted by mo .
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?
amount of premium coffee --- x
amount of cheaper coffee --- 36-x
17x + 7(36-x) = 11(36)
solve for x