document.write( "Question 352130: How many ounces of pure chocolate must be added to 220 ounces of chocolate topping that is 50% chocolate to make a topping that is 75% chocolate? \n" ); document.write( "
Algebra.Com's Answer #251624 by nerdybill(7384)\"\" \"About 
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How many ounces of pure chocolate must be added to 220 ounces of chocolate topping that is 50% chocolate to make a topping that is 75% chocolate?
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\n" ); document.write( "Let x = amount (ounces) pf pure chocolate to add
\n" ); document.write( "then
\n" ); document.write( "x + .50(220) = .75(220+x)
\n" ); document.write( "x + 110 = 165 + .75x
\n" ); document.write( ".25x + 110 = 165
\n" ); document.write( ".25x = 55
\n" ); document.write( "x = 220 ounces
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