document.write( "Question 778390: The cooling system of a car has a capacity of 15 liters. If the system is currently filled with a mixture that is 40% antifreeze, ow much of tis mixture should be drained and replaced with pure antifreeze so the system is filled with a solution that is 50% antifreeze? \n" ); document.write( "

Algebra.Com's Answer #474625 by josgarithmetic(39618) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let v = volume to drain and replace.\r
\n" ); document.write( "\n" ); document.write( " $\"%2815%2A40-v%2A40%2Bv%2A100%29%2F15=50\"$
\n" ); document.write( " $\"%2815%2A40%2B60v%29%2F15=50\"$
\n" ); document.write( " $\"15%2A40%2B60v=15%2A50\"$
\n" ); document.write( " $\"15%2A4%2B6v=15%2A5\"$
\n" ); document.write( " $\"6v=15%285-4%29\"$
\n" ); document.write( " $\"6v=15\"$
\n" ); document.write( " $\"2v=5\"$
\n" ); document.write( " $\"v=2%261%2F2\"$ \n" ); document.write( "

\n" );