document.write( "Question 358540: If you have a solution that's 40% alcohol and another that's 70% alcohol how much of the 70% alcohol do you have to add to the 40% to make the 40% raise to 50% alcohol. Start with 100 ml of the 70% solution? \n" ); document.write( "
Algebra.Com's Answer #255946 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! .70*100+.40X=.50(100+X) \n" ); document.write( "70+.40X=50+.50X \n" ); document.write( ".40X-.50X=50-70 \n" ); document.write( "-.10X=-20 \n" ); document.write( "X=-20/-.10 \n" ); document.write( "X=200 ml. OF THE 40% ALCOHOL IS USED. \n" ); document.write( "PROOF: \n" ); document.write( ".70*100+.40*200=.50(100+200) \n" ); document.write( "70+80=.5*300 \n" ); document.write( "150=150 \n" ); document.write( " |