document.write( "Question 510418: how many liters of a 25% alcohol solution must be mixed wuth a 12% solution to get 13 liters of 15% solution. \n" ); document.write( "
Algebra.Com's Answer #341810 by Maths68(1474)\"\" \"About 
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Solution A
\n" ); document.write( "Concentration = 25%=0.25
\n" ); document.write( "Amount = x
\n" ); document.write( "=======================
\n" ); document.write( "Solution B
\n" ); document.write( "Concentration = 12%=0.12
\n" ); document.write( "Amount = 13-x
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\n" ); document.write( "Resultant Solution
\n" ); document.write( "Concentration = 15%=0.15
\n" ); document.write( "Amount = 13 liters
\n" ); document.write( "========================================
\n" ); document.write( "(Concentration of A * Amount of A)+(Concentration of B * Amount of B)=(Concentration of Resultant * Amount of Resultant)
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\n" ); document.write( "0.25x+0.12(13-x)=0.15*13
\n" ); document.write( "0.25x+1.56-0.12x=1.95
\n" ); document.write( "0.25x+1.56-0.12x=1.95
\n" ); document.write( "0.13x=1.95-1.56
\n" ); document.write( "0.13x=0.39
\n" ); document.write( "0.13x/13=0.39/13
\n" ); document.write( "x=3
\n" ); document.write( "==========================================
\n" ); document.write( "Amount of solution A = x = 3 liters
\n" ); document.write( "Amount of solution B = 13-x = 13-3 = 10 liters \r
\n" ); document.write( "\n" ); document.write( "Answer
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\n" ); document.write( "3 liters of a 25% alcohol solution must be mixed with 10 liters of 12% solution to get 13 liters of 15% solution.
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