document.write( "Question 906375: The radiator in a car is filled with a solution of 65% antifreeze and 35% water. The manufacturer of the antifreeze suggests that for summer driving, optimal cooling of the engine is obtained with only 50% antifreeze. If the capacity of the radiator is 4.3 liters, how much coolant (in liters) must be drained and replaced with pure water to reduce the antifreeze concentration to 50%?
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Algebra.Com's Answer #549772 by stanbon(75887) $\"\"$ $\"About$

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The radiator in a car is filled with a solution of 65% antifreeze and 35% water. The manufacturer of the antifreeze suggests that for summer driving, optimal cooling of the engine is obtained with only 50% antifreeze. If the capacity of the radiator is 4.3 liters, how much coolant (in liters) must be drained and replaced with pure water to reduce the antifreeze concentration to 50%?
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\n" ); document.write( "anti - anti + anti = anti
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\n" ); document.write( "0.65*4.3 - 0.65x + 0.00x = 0.50*4.3
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\n" ); document.write( "65*4.3 - 65x + 0 = 50*4.3
\n" ); document.write( "65x = 15*4.3
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\n" ); document.write( "x = 0.23*4.3
\n" ); document.write( "x = 0.9923 liters (amt of liquid to drain and replace with pure water)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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