document.write( "Question 704349: 140 litre of an acid contains 90% of acid and the rest water. How much water must be added to make the water 12.5% of resulting mixture? \n" ); document.write( "

Algebra.Com's Answer #434054 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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140 litre of an acid contains 90% of acid and the rest water.
\n" ); document.write( " How much water must be added to make the water 12.5% of resulting mixture?
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\n" ); document.write( "let x = amt of water required
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\n" ); document.write( "When the water amt is increased to 12.5%, the acid amt: 100 - 12.5 = 87.5%
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\n" ); document.write( ".90(140) = .875(w+140)
\n" ); document.write( "126 = .875w + 122.5
\n" ); document.write( "126 - 122.5 = .875w
\n" ); document.write( "3.5 = .875w
\n" ); document.write( "w = 3.5/.875
\n" ); document.write( "w = 4 liters of water added
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