document.write( "Question 422580: A mechanic needs a radiator to have a 40% antifreeze solution. The radiator currently is filled with 4 gallons of a 25% antrifreeze solution. How much of the antifreeze mixture should be drained from the car if the mechanic replaces it with pure antifreeze?
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Algebra.Com's Answer #295097 by lwsshak3(11628)![]() ![]() ![]() You can put this solution on YOUR website! A mechanic needs a radiator to have a 40% antifreeze solution. The radiator currently is filled with 4 gallons of a 25% antrifreeze solution. How much of the antifreeze mixture should be drained from the car if the mechanic replaces it with pure antifreeze?\r \n" ); document.write( "\n" ); document.write( "..\r \n" ); document.write( "\n" ); document.write( "let x=gallons of current mixture to be drained and replaced with pure antifreeze. \n" ); document.write( "4-x=gallons of current mixture remaining in the car. \n" ); document.write( ".25(4-x)+1.00x=.40*4 \n" ); document.write( "1-.25x+x=1.6 \n" ); document.write( ".75x=.6 \n" ); document.write( "x=.6/.75=0.8 gal \n" ); document.write( "ans: \n" ); document.write( "0.8 gallons of current mixture to be drained and replaced with pure antifreeze. \n" ); document.write( " |