SOLUTION: A store sells walnuts for 3.00 per pound and pecans for 5.00 per pound. How many pounds of each should be used to make a mixture that weighs 10 pounds and cost 3.70 per pound.

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Question 603735: A store sells walnuts for 3.00 per pound and pecans for 5.00 per pound. How many pounds of each should be used to make a mixture that weighs 10 pounds and cost 3.70 per pound.
Answer by alicealc(293) About Me  (Show Source):
You can put this solution on YOUR website!
walnuts' weight = W pounds
pecans' weight = (10 - W) pounds

3%2AW+%2B+5%2A%2810+-+W%29+=+10%2A3.7
3W + 50 - 5W = 37
50 - 37 = 5W - 3W
13 = 2W
W = 13/2 = 6.5

So, walnuts weight should be 6.5 pounds and pecans' weight should be (10 - 6.5) = 3.5 pounds