document.write( "Question 900021: How many gallons of 15% alcohol solution and 45% alcohol solution must be mixed to get 12 gallons of 25% alcohol solution? \n" ); document.write( "
Algebra.Com's Answer #545758 by richwmiller(17219)![]() ![]() You can put this solution on YOUR website! a+b=12, \n" ); document.write( "0.15*a+0.45*b=0.25*12 \n" ); document.write( "a=12-b \n" ); document.write( "0.15*(12-b)+0.45*b=3 \n" ); document.write( "1.8-0.15b+0.45*b=3 \n" ); document.write( "0.3*b=1.2 \n" ); document.write( "b=4 \n" ); document.write( "a=12-b \n" ); document.write( "a=8 b=4 \n" ); document.write( "check \n" ); document.write( "0.15*8+0.45*4=0.25*12 \n" ); document.write( "1.2+1.8=3 \n" ); document.write( "3=3 \n" ); document.write( "ok \n" ); document.write( " \n" ); document.write( " |