SOLUTION: How many pounds of a 12% aluminum alloy must be mixed with 400 pounds of a 25% aluminum alloy to make a 17% aluminum alloy?

Question 126875: How many pounds of a 12% aluminum alloy must be mixed with 400 pounds of a 25% aluminum alloy to make a 17% aluminum alloy?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
In words:
(pounds of aluminum in 12% alloy) + (pounds of aluminum in 25% alloy)
divided by (total pounds of mixture) = 17%
Let = pounds of 12% alloy needed
Let = pounds of 25% alloy needed

640 pounds of 12% alloy must be used
check answer

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