document.write( "Question 711788: The radiator in a car is filled with a solution of 60% antifreeze and 40% 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 3.6 L, how much coolant should be drained and replaced with water to reduce the antifreeze concentration to the recommended level?
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Algebra.Com's Answer #437630 by lwsshak3(11628) $\"\"$ $\"About$

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The radiator in a car is filled with a solution of 60% antifreeze and 40% 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 3.6 L, how much coolant should be drained and replaced with water to reduce the antifreeze concentration to the recommended level?
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\n" ); document.write( "let x=amt of coolant to be drained and replaced with water.
\n" ); document.write( "3.6-x=amt of original solution remaining in radiator.
\n" ); document.write( "..
\n" ); document.write( "60%(3.6-x)+0%x=50%*3.6
\n" ); document.write( "2.16-.6x=1.8
\n" ); document.write( ".6x=.36
\n" ); document.write( "x=0.6
\n" ); document.write( "amt of coolant to be drained and replaced with water=.6 L \n" ); document.write( "

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