document.write( "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? \n" ); document.write( "
Algebra.Com's Answer #260369 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
This metal alloy is composed of 90% tin, 7% antimony, and 3% copper.
\n" ); document.write( " How many ounces of pure tin must be added to the alloy to make 6 ounces
\n" ); document.write( " of a metal that is 94% tin?
\n" ); document.write( ":
\n" ); document.write( "Do this on the basis of percent tin, we can ignore the other elements in the equation
\n" ); document.write( ":
\n" ); document.write( "Let x = amt of pure tin to be added
\n" ); document.write( "then
\n" ); document.write( "(6-x) = amt of 90% tin required
\n" ); document.write( ":
\n" ); document.write( ".90(6-x) + x = .94(6)
\n" ); document.write( "5.4 - .9x + x = 5.64
\n" ); document.write( "-,9x + x = 5.64 - 5.4
\n" ); document.write( ".1x = .24
\n" ); document.write( "x = \".24%2F.1\"
\n" ); document.write( "x = 2.4 oz of pure tin to be added to 3.6 of the original alloy
\n" ); document.write( " \n" ); document.write( "
\n" );