document.write( "Question 798597: Wilson has a bottle containing 35 millimeters of 15% saline solution and a bottle of 40% saline solution. She wants a 30% solution. How much of the 40% solution must be added to the 15% solution so that 30% concentration is created? \n" ); document.write( "

Algebra.Com's Answer #482300 by Finavon(81) $\"\"$ $\"About$

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Vol 40%: n
\n" ); document.write( "35 @ 15% = 525
\n" ); document.write( "n @ 40% = 40n
\n" ); document.write( "Total 35+n @ 30% = 525+40n
\n" ); document.write( "So $\"+%28525%2B40n%29%2F%2835%2Bn%29=30+\"$
\n" ); document.write( "525 + 40n = 30*35 + 30n
\n" ); document.write( "Subtracting (30n + 525) gives
\n" ); document.write( "10n = 1050-525 = 525
\n" ); document.write( "n = 52.5ml
\n" ); document.write( "Check :
\n" ); document.write( " $\"+%28525%2B52.5%2A40%29%2F%2835%2B52.5%29+=+%28525%2B2100%29%2F87.5\"$
\n" ); document.write( "= $\"2625%2F87.5=30%25\"$ \n" ); document.write( "

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