document.write( "Question 807456: How much of an alloy that is 40% copper should be mixed with 300 ounces of an alloy that is 90% copper in order to get an alloy that is 50% copper \n" ); document.write( "
Algebra.Com's Answer #486313 by mananth(16946)\"\" \"About 
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--- percent ---------------- Amount
\n" ); document.write( "Alloy I 90 ---------------- 300 ounces
\n" ); document.write( "Alloy II 40 ---------------- x ounces
\n" ); document.write( "Mixture 50 ---------------- 300 + x ounces
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\n" ); document.write( "90 * 300 + 40 x = 50 ( 300 + x )
\n" ); document.write( "27000 + 40 x = 15000 + 50 x
\n" ); document.write( "40 x -50 x = -27000 + 15000
\n" ); document.write( "-10 x = -12000
\n" ); document.write( "/ -10
\n" ); document.write( "x = 1200 ounces Alloy II
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\n" ); document.write( "m.ananth@hotmail.ca
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