SOLUTION: How much of an alloy that is 40% zinc should be added to 75 pounds of an alloy that is 65% zinc to get an alloy that is 50% zinc?

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Question 327116: How much of an alloy that is 40% zinc should be added to 75 pounds of an alloy that is 65% zinc to get an alloy that is 50% zinc?
Answer by nyc_function(2741) About Me  (Show Source):
You can put this solution on YOUR website!
Try the following equation letting A = amount of allow you need to find.
0.40A + 75(0.65) = 0.50(A + 75)
Solve for A.