Problema Solution
: To make a mixture of 80 pounds of coffee woth $272, a grocer mixes coffee worth $3.25 a pound with coffee worth 3.85 a pound. how many pounds of cheaper coffee should the grocer use?.
Answer provided by our tutors
Let 'x' represent the amount of $3.25 a pound coffee used, then '80-x' represents the amount of $3.85 a pound coffee.
272=3.25x+3.85(80-x)
x=60
80-60=20
So 20 pounds of $3.85 a pound coffee are mixed with 60 pounds of $3.25 a pound coffee for a total cost of $272 for coffee.