SOLUTION: A scientist has one alloy containing 39% copper and another containing 61% copper. How many pounds of each alloy must he use to make 41 pounds of a third alloy containing 48% coppe

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Question 428026: A scientist has one alloy containing 39% copper and another containing 61% copper. How many pounds of each alloy must he use to make 41 pounds of a third alloy containing 48% copper?
Answer by mananth(16949) About Me  (Show Source):
You can put this solution on YOUR website!
.........percent ---------------- quantity
Alloy 1 39 ---------------- x pounds
Alloy 2 61 ---------------- 41-x pounds
Total 48% ---------------- 41

39x+61(41-x)=48* 41

39x+2501 -61x=1968
39x-61x= 1968-2501
-22x=-533
/-22
x=24.23 pounds 39.00%
16.77 pounds 61.00%