document.write( "Question 507316: how many liters should be drained and replaced with pure antifreeze from a radiator containing 12 liters of 40 percent antifreeze to increase the concentration to 50 percent antifreeze. \n" ); document.write( "
Algebra.Com's Answer #340423 by stanbon(75887)\"\" \"About 
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how many liters should be drained and replaced with pure antifreeze from a radiator containing 12 liters of 40 percent antifreeze to increase the concentration to 50 percent antifreeze.
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\n" ); document.write( "alcohol - alcohol + alcohol = alcohol
\n" ); document.write( "0.40*12 - 0.40x + 1.0x = 0.50*12
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\n" ); document.write( "Multiply thru by 100 to get:
\n" ); document.write( "40*12 - 40x + 100x = 50*12
\n" ); document.write( "60x = 10*12
\n" ); document.write( "x = 2 liters (amt. to be replaced by pure antifreeze)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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