document.write( "Question 213388: how many gallons of pure alcohol should b mixed with 20 gallons of a 15% alchol solution to obtain a mixture that is 25% alcohol? \n" ); document.write( "
Algebra.Com's Answer #161178 by RAY100(1637)![]() ![]() ![]() You can put this solution on YOUR website! Let x = gallons of pure(100%) alcohol added \n" ); document.write( ". \n" ); document.write( "x(1.00) +20(.15) = (20 +x)(.25) \n" ); document.write( ". \n" ); document.write( "x+3=5+.25x,,,,,,,,,alcohol balance \n" ); document.write( ". \n" ); document.write( ",75 x = 2 \n" ); document.write( ". \n" ); document.write( "x=2.67 gallons \n" ); document.write( ". \n" ); document.write( ". \n" ); document.write( "check,,,2.67 +3 = 22.67 * .25 = 5.67,,,,,ok \n" ); document.write( ". \n" ); document.write( " \n" ); document.write( " |