document.write( "Question 376654: Please help me with this: How much 12-karat (50%) gold must be mixed with pure gold to obtain 60 grams of 16-karat (66.6667%) gold? The mass of pure gold is not given. \n" ); document.write( "
Algebra.Com's Answer #267932 by mananth(16946)\"\" \"About 
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How much 12-karat (50%) gold must be mixed with pure gold to obtain 60 grams of 16-karat (66.6667%) gold? The mass of pure gold is not given.
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\n" ); document.write( "12-karat (50%) gold.............x grams
\n" ); document.write( "pure gold 100% ................60-x grams
\n" ); document.write( "to obtain 66.6667%............. 60 grams
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\n" ); document.write( "50x+100(60-x)=66.6667*60
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\n" ); document.write( "50x +6000-100x=4000 ( rounded off)
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\n" ); document.write( "-50x=-6000+4000
\n" ); document.write( "-50x=-2000
\n" ); document.write( "/-50
\n" ); document.write( "x=40 grams of 50% gold is to be mixed.
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\n" ); document.write( "m.annath@hotmail.ca
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