SOLUTION: how many pounds of walnuts which costs $4 per puondmust be mixed with 25 pounds of almondscosting $7.50 per pound to make a mixture which will cost $6.50 per pound?

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Question 250427: how many pounds of walnuts which costs $4 per puondmust be mixed with 25 pounds of almondscosting $7.50 per pound to make a mixture which will cost $6.50 per pound?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Let A be the number of pounds of walnuts.
+4A%2B7.5%2825%29=6.5%28A%2B25%29+
+4A%2B187.5=6.5A%2B162.5+
+2.5A=25+
+A=10+
10 pounds of walnuts.