document.write( "Question 1169635: Johnnyneeds 10liters of a 15% acid solution. He currently has a 10%solution and a 30%solution. How many liters of 10% solution does he need to make the needed 10liters of 15% acidsolution? \n" ); document.write( "

Algebra.Com's Answer #794422 by htmentor(1343) $\"\"$ $\"About$

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Let x = the number of liters of the 10% solution. Then 10-x is the volume of the
\n" ); document.write( "30% solution.
\n" ); document.write( "The final mixture is 10 liters, of which 15% is acid.
\n" ); document.write( "So the final mixture has 0.15*10 = 1.5 liters of acid
\n" ); document.write( "1.5 = 0.1x + 0.3(10-x) -> 1.5 = 0.2x -> x = 7.5 liters \n" ); document.write( "

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