document.write( "Question 1180854: You need a 95% alcohol solution. On hand, you have a 15 mL of a 10% alcohol mixture. How much pure alcohol will you need to add to obtain the desired solution?\r
\n" ); document.write( "\n" ); document.write( "You will need
\n" ); document.write( " (?) mL of pure alcohol
\n" ); document.write( "to obtain
\n" ); document.write( "(?) mL of the desired 95% solution. \n" ); document.write( "

Algebra.Com's Answer #810647 by MathTherapy(10552) $\"\"$ $\"About$

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\n" ); document.write( "You need a 95% alcohol solution. On hand, you have a 15 mL of a 10% alcohol mixture. How much pure alcohol will you need to add to obtain the desired solution?\r
\n" ); document.write( "\n" ); document.write( "You will need
\n" ); document.write( " (?) mL of pure alcohol
\n" ); document.write( "to obtain
\n" ); document.write( "(?) mL of the desired 95% solution.
\n" ); document.write( "

Let amount of pure alcohol, be A
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document.write( "Then we get: .1(15) + A = .95(15 + A)
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document.write( ".1(15) + A = .95(15) + .95A
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document.write( "A - .95A = .95(15) - .1(15)
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document.write( ".05A = .85(15)
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document.write( "Amount of pure alcohol to mix, or  \n" );
document.write( "

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