document.write( "Question 197840: A solution containing 28% acid is to be mixed with a solution containing 40% acid to make a 300 L solution which contains 36% acid. How of each solution should be used to make the desired mixture? \n" ); document.write( "
Algebra.Com's Answer #148357 by checkley77(12844)\"\" \"About 
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.40x+.28(300-x)=.36*300
\n" ); document.write( ".40x+84-.28x=108
\n" ); document.write( ".12x=108-84
\n" ); document.write( ".12x=24
\n" ); document.write( "x=24/.12
\n" ); document.write( "x=200 L of 40% solution is used.
\n" ); document.write( "300-200=100 L of 28% solution is used.
\n" ); document.write( "Proof:
\n" ); document.write( ".40*200+.28*100=.36*300
\n" ); document.write( "80+28=108
\n" ); document.write( "108=108
\n" ); document.write( "
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