Problema Solution
How many pounds of coffee worth $7 a pound should be added to 14 pounds of coffee worth $4 a pound to get a mixture worth $5 a pound?
Answer provided by our tutors
let
x = lbs of coffee worth $7 a pound
7x + 4*14 = 5(x + 14)
by solving we find
x = 7 lbs
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7 lbs of coffee worth $7 a pound should be added.