SOLUTION: how many pounds of blue coffee selling at $5 per pound should be mixed with 80 pounds of regular coffee selling at $2 per pound to make a mixture selling for $2.60 per pound?

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Question 706149: how many pounds of blue coffee selling at $5 per pound should be mixed with 80 pounds of regular coffee selling at $2 per pound to make a mixture selling for $2.60 per pound?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Target Price, $2.60 per pound.
n= how many pounds of blue coffee.

%285.00n%2B2.00%2A80%29%2F%28n%2B80%29=2.60
=5n%2B2%2A80=2.60%28n%2B80%29
5n%2B2%2A80=2.6n%2B2.6%2A80
5n-2.6n=%282.6-2%29%2A80

2.4n=0.6%2A80

n=0.6%2A80%2F2.4=%286%2F24%29%2A80=%281%2F4%29%2A80=20

highlight%28n=20%29 pounds of blue coffee