SOLUTION: how much of an alloy that is 20% copper should be mixed with 500 ounces of an alloy that is 60% copper in order to get an alloy that is 30% copper

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Question 751163: how much of an alloy that is 20% copper should be mixed with 500 ounces of an alloy that is 60% copper in order to get an alloy that is 30% copper
Answer by tommyt3rd(5050) About Me  (Show Source):
You can put this solution on YOUR website!
how much of an alloy that is 20% copper: 0.20x
should be mixed with 500 ounces of an alloy that is 60% copper: 500(0.60)=300
in order to get: =
an alloy that is 30% copper: (x+500)(0.30)

putting them together:
0.2x+300=(x+500)(0.30)

which gives us x=1500 ounces


:)