SOLUTION: How many grams of an alloy containing 30% copper must be combined with 80 grams of an alloy containing 45% copper in order to form an alloy that is 35% copper?

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Question 739121: How many grams of an alloy containing 30% copper must be combined with 80 grams of an alloy containing 45% copper in order to form an alloy that is 35% copper?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
.3x+.45*80=.35(80+x)
x=160