document.write( "Question 401189: A car radiator has a 16 quart capacity and is currently filled with a 40% antifreeze solution. How many quarts of this solution must be drained off and replaced with 100% antifreeze to create a 50% antifreeze solution? \n" ); document.write( "
Algebra.Com's Answer #283866 by nerdybill(7384)\"\" \"About 
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A car radiator has a 16 quart capacity and is currently filled with a 40% antifreeze solution. How many quarts of this solution must be drained off and replaced with 100% antifreeze to create a 50% antifreeze solution?
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\n" ); document.write( "Let x = amount (quarts) to be drained and replaced
\n" ); document.write( "then
\n" ); document.write( ".40(16-x) + x = .50(16)
\n" ); document.write( "6.4-.40x + x = 8
\n" ); document.write( "6.4 + .60x = 8
\n" ); document.write( ".60x = 1.6
\n" ); document.write( "x = 1.6/.60
\n" ); document.write( "x = 2.67 quarts
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