document.write( "Question 430619: How much pure gold should be melted into 5 grams of a 62% gold alloy to make it an 85% gold alloy? \n" ); document.write( "
Algebra.Com's Answer #299029 by stanbon(75887)\"\" \"About 
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How much pure gold should be melted into 5 grams of a 62% gold alloy to make it an 85% gold alloy?
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\n" ); document.write( "Equation:
\n" ); document.write( "gold + gold = gold
\n" ); document.write( "0.62*5 + 1.00x = 0.85*(5+x)
\n" ); document.write( "Multiply thru by 100:
\n" ); document.write( "62*5 + 100x = 85*5+85x
\n" ); document.write( "15x = 23*5
\n" ); document.write( "x = (1/3)23
\n" ); document.write( "x = 7 2/3 oz (amt. of pure gold needed)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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