SOLUTION: A grocer needs 30 kilograms of mixed spices which he wishes to sell for 35$/kg. How many kg of spices which sell for 25$ and for 40$ a kg respectively must he used to get the desir

Question 1044168: A grocer needs 30 kilograms of mixed spices which he wishes to sell for 35$/kg. How many kg of spices which sell for 25$ and for 40$ a kg respectively must he used to get the desired mixture?
Answer by josgarithmetic(39616) (Show Source): You can put this solution on YOUR website!
Give a variable to either unknown spice quantity.
x for the 25 dollars per kilograms spice
30-x for the 40 dollars per kilogram spice

two-part mixture using just one variable

You could use two variables if you want.
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