document.write( "Question 518514: A chemist has one solution of 20% acid and another of 50% acid. How many milliliters of each are needed to obtain 18 milliliters of 30% acid? \n" ); document.write( "
Algebra.Com's Answer #345206 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
x+y=18
\n" ); document.write( ".2x+.5y=.3*18
\n" ); document.write( "x=12 ml of 20%
\n" ); document.write( "y=6 ml of 50%
\n" ); document.write( "check
\n" ); document.write( ".2*12+.5*6=.3*18
\n" ); document.write( "2.4+3=5.4
\n" ); document.write( "5.4=5.4
\n" ); document.write( "ok\r
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "
\n" );