document.write( "Question 457058: an 11% salt solution was mixed with an 18% salt solution to make 20L of a 16% solution. How many liters of 11% salt solution were required? \n" ); document.write( "
Algebra.Com's Answer #317119 by jorel1380(3719)\"\" \"About 
You can put this solution on YOUR website!
m+n=20
\n" ); document.write( ".11m+.18n=20(.16)=3.2
\n" ); document.write( "11m+18n=320
\n" ); document.write( "11m+11n=220
\n" ); document.write( "7n=100
\n" ); document.write( "n=100/7
\n" ); document.write( "m=40/7
\n" ); document.write( "You need 40/7 liters of 11% salt solution for your mix..
\n" ); document.write( "
\n" );