document.write( "Question 416217: a tank has a capacity of10 gal. when it is fill it contains 15% alcohol. how many gallons must be replaced by on 80% alcohol solution to give 10 gallons of 70% solution? \n" ); document.write( "
Algebra.Com's Answer #291635 by mananth(16946)![]() ![]() You can put this solution on YOUR website! percent ----------------quantity gallons \n" ); document.write( "80 ----------------x \n" ); document.write( "15 ----------------10-x \n" ); document.write( "70.00% ----------------10 \r \n" ); document.write( "\n" ); document.write( ">>> \n" ); document.write( "80x+15(10-x)=70 *10 \n" ); document.write( "80x+150-15x= 700 \n" ); document.write( "80x-15x =700 - 150 \n" ); document.write( "65x=550 \n" ); document.write( "/65 \n" ); document.write( "x=8.46 gallons of 80% \n" ); document.write( " \n" ); document.write( " |