document.write( "Question 995254: how many liters of a 70% acid solution must be mixed with a 30% acid solution to get 240 L of a 60% acid solution? \n" ); document.write( "
Algebra.Com's Answer #614040 by macston(5194)\"\" \"About 
You can put this solution on YOUR website!
.
\n" ); document.write( "S=amount of 70% solution: T=amount of 30% solution
\n" ); document.write( ".
\n" ); document.write( "S+T=240L
\n" ); document.write( "T=240L-S
\n" ); document.write( ".
\n" ); document.write( "(0.70)S+(0.30)T=(0.60)(240L)
\n" ); document.write( "(0.70)S+(0.30)(240L-S)=144L
\n" ); document.write( "0.70S+72L-0.30S=144L
\n" ); document.write( "0.40S=72
\n" ); document.write( "S=180L
\n" ); document.write( "T=240L-S=240L-180L=60L
\n" ); document.write( ".
\n" ); document.write( "ANSWER: 180 liters of 70% solution mixed with 60 liters
\n" ); document.write( "of 30% solution yields 240 liters of 60% solution.
\n" ); document.write( ".
\n" ); document.write( "CHECK:
\n" ); document.write( ".
\n" ); document.write( "(0.70)S+(0.30)T=(0.60)(240L)
\n" ); document.write( "(0.70)180L+(0.30)60L=(0.60)(240L)
\n" ); document.write( "126L+18L=144L
\n" ); document.write( "144L=144L
\n" ); document.write( ".
\n" ); document.write( "
\n" ); document.write( "
\n" );