How much of an alloy that is 30% copper should be mixed with 600 ounces of an alloy that is 80% copper in order to get an alloy that is 40% copper?

1 Answer
Nov 14, 2016

Answer:

The amount is #=2400# ounces

Explanation:

Let #x# ouncs be amount of the alloy

And the total #=x+600# ounces

Therefore the balance with respect to copper is

#x*0.3 +600*0.8=(x+600)*0.4#

#0.3x+480=0.4x+240#

#0.1x=240#

#x=2400# ounces