document.write( "Question 800175: A goldsmith has 10g of a 50% gold alloy. How many grams of pure gold should be added to the alloy to make an alloy which is 75% gold? \n" ); document.write( "
Algebra.Com's Answer #482972 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
(10*.5)+x=.75(10+x)\r
\n" ); document.write( "\n" ); document.write( "5+x=7.5+.75x
\n" ); document.write( ".25x=2.5
\n" ); document.write( "x=10
\n" ); document.write( "check
\n" ); document.write( "5+10=.75(20)
\n" ); document.write( "15=15
\n" ); document.write( "ok\r
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