Problema Solution
The manager of a coffee shop has one type of coffee that sells for $7 per pound and another type that sells for $13 per pound. The manager wishes to mix 50 pounds of the $13 coffee to get a mixture that will sell for $9 per pound. How many pounds of the $7 coffee should be used?
Answer provided by our tutors
let
x = lbs of the $7 coffee
7x + 13*50 = 9*(x + 50)
by solving we find:
x = 100 lbs
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100 pounds of the $7 should be used.