document.write( "Question 442805: A chemist needs 9 liters of a 50% salt solution. All she has available is a 20% salt solution and a 70% salt solution. How much of each of the two solutions should she mix to obtain her desired solution? Show work please. \n" ); document.write( "
Algebra.Com's Answer #306188 by jorel1380(3719)\"\" \"About 
You can put this solution on YOUR website!
x+y=9
\n" ); document.write( ".20x+.70y=4.5
\n" ); document.write( "2x+7y=45
\n" ); document.write( "2x+2y=18
\n" ); document.write( "5y=27
\n" ); document.write( "y=27/5
\n" ); document.write( "x=18/5
\n" ); document.write( "She needs 18/5 liters 20% solution and 27/5 liters 70% solution..
\n" ); document.write( "
\n" );