SOLUTION: This metal alloy is composed of 90% tin, 7% antimony, and 3% copper. How many ounces of pure tin must be added to the alloy to make 6 ounces of a metal that is 94% tin?

Question 364885: This metal alloy is composed of 90% tin, 7% antimony, and 3% copper. How many ounces of pure tin must be added to the alloy to make 6 ounces of a metal that is 94% tin?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
This metal alloy is composed of 90% tin, 7% antimony, and 3% copper.
How many ounces of pure tin must be added to the alloy to make 6 ounces
of a metal that is 94% tin?
:
Do this on the basis of percent tin, we can ignore the other elements in the equation
:
Let x = amt of pure tin to be added
then
(6-x) = amt of 90% tin required
:
.90(6-x) + x = .94(6)
5.4 - .9x + x = 5.64
-,9x + x = 5.64 - 5.4
.1x = .24
x =
x = 2.4 oz of pure tin to be added to 3.6 of the original alloy

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