document.write( "Question 348076: How much water should be added to 1 gallon of antifreeze to obtain a solution that is 60% antifreeze? \n" ); document.write( "
Algebra.Com's Answer #248892 by Jk22(389)![]() ![]() You can put this solution on YOUR website! 1 gallon should equal 60%. Let w water gallon added : the total is 1+w gallon, of which 60% is antefreeze, hence 1 gallon : \n" ); document.write( " \n" ); document.write( "0.6*(1+w)=1=0.6+0.6w \n" ); document.write( " \n" ); document.write( "0.4=0.6w \n" ); document.write( " \n" ); document.write( "w=4/6=2/3~0.66 gallons. \n" ); document.write( " \n" ); document.write( "Verif : Total : 1+2/3, % antifreeze : 1/(1+2/3)=3/(3+2)=3/5=60/100. \n" ); document.write( " |