SOLUTION: How many tons of an alloy that is 5% nickel must be added to 15 tons of an alloy that is 20% nickel to make an alloy that is 10% nickel?

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Question 451459: How many tons of an alloy that is 5% nickel must be added to 15 tons of an alloy that is 20% nickel to make an alloy that is 10% nickel?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
.05x+15(.2)=.1(15+x)
.05x+3=1.5+.1x
.05x=1.5
x=1.5/.05=30
30 tons of 5% nickel alloy must be added to the mix..