SOLUTION: By weight, an alloy of brass is 60% copper and 40% zinc. Another alloy of brass is 30% copper and 70% zinc. How many grams of each of these alloys must be melted and combined to ob

Question 329353: By weight, an alloy of brass is 60% copper and 40% zinc. Another alloy of brass is 30% copper and 70% zinc. How many grams of each of these alloys must be melted and combined to obtain 300 grams of a brass with equal concentration of copper and zinc?
Answer by galactus(183) (Show Source): You can put this solution on YOUR website!
Let x=amount of the 60% copper alloy.
Then, we have .60x+.30(300-x)=.50(300)
x=200 grams of the 60% alloy and 100 grams of the 30% alloy.
This amounts to 150 grams of copper. The other 150 grams is zinc. 50/50 ratio.
RELATED QUESTIONS
By mass, one alloy consists of 60% copper and 40% ziinc. Another is 30% copper and 70%... (answered by stanbon)

Brass is made of a mixture of zinc and copper. How many ounces of pure zinc must be mixed (answered by Fombitz)

How many ounces of pure zinc must be added to 20 ounces of brass which is 30% zinc and... (answered by mananth)

How many ounces of pure zinc must be alloyed with 20 ounces of brass that is 30% zinc and (answered by josgarithmetic)

by weight, one alloy is 75%copper and 25%zinc. Another alloy is 42%copper and 58%zinc.... (answered by Paul)

Brass is an alloy created using 80% copper and 20% zinc. If Henri�s brass trumpet... (answered by checkley77)

Brass is an alloy containing only copper and zinc. A particular batch of brass is... (answered by ankor@dixie-net.com)

By volume, one alloy is 70% copper, 20% zinc, and 10% nickel. A second alloy is 60%... (answered by stanbon)

Brass is an alloy the contains the metals copper and zinc. Copper typically accounts for... (answered by mananth)