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)![]() ![]() 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( " |