SOLUTION: Brass is made of a mixture of zinc and copper. How many ounces of pure zinc must be mixed with 20 ounces of brass that is 30% zinc and 70% copper to produce brass that is 40% zinc?

Question 850660: Brass is made of a mixture of zinc and copper. How many ounces of pure zinc must be mixed with 20 ounces of brass that is 30% zinc and 70% copper to produce brass that is 40% zinc?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Let X be the number of ounces of 100% zinc,

ounces

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