document.write( "Question 449124: The radiator in Natalie’s car contains 6.3 L of antifreeze and water. This mixture is 30% antifreeze. How much of this mixture should she drain and replace with pure antifreeze so that there will be a mixture of 50% antifreeze? \n" ); document.write( "
Algebra.Com's Answer #308989 by mananth(16946)![]() ![]() You can put this solution on YOUR website! ------ percent ---------------- quantity \n" ); document.write( "Antifreez1 I 80 ---------------- 40 gallons \n" ); document.write( "Antifreeze II 10 ---------------- x gallons \n" ); document.write( "Total 30 ---------------- 40 + x gallons \n" ); document.write( " \n" ); document.write( "30*6.3+100*x=50(6.3+x) \n" ); document.write( "189+100x =315+50x \n" ); document.write( "100x-50x =315-189 \n" ); document.write( "50x=126 \n" ); document.write( "/50 \n" ); document.write( "x=2.52 liters 100% Antifreeze \n" ); document.write( " \n" ); document.write( " |