document.write( "Question 1152168: How much water must be evaporated from 17qt of a 65% antifreeze solution to produce an 85% solution? \n" ); document.write( "

Algebra.Com's Answer #774111 by ikleyn(52788) $\"\"$ $\"About$

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document.write( "Let W be the volume of water to be evaporated.\r\n" );
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document.write( "The amount of the pure antifreeze in the original mixture is 0.65*17 qt.\r\n" );
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document.write( "The volume of the mixture after evaporating water is  (17 - W) qt.\r\n" );
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document.write( "The new concentration equation is\r\n" );
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document.write( "     = 0.85.     (1)\r\n" );
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document.write( "To solve it, multiply both sides by (17-W).  You will get\r\n" );
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document.write( "    0.65*17 = 0.85*(17-W).\r\n" );
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document.write( "From the equation,  \r\n" );
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document.write( "    W =  = 4.\r\n" );
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document.write( "ANSWER.  4 qt of water must be evaporated.\r\n" );
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document.write( "To check the answer, substitute the found value W= 4 into the basic equation (1).\r\n" );
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\n" ); document.write( "\n" ); document.write( "It is one of typical mixture problems.\r
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\n" ); document.write( "\n" ); document.write( "There is a bunch of introductory lessons in this site, covering various types of mixture problems \r
\n" ); document.write( "\n" ); document.write( "    - Mixture problems\r
\n" ); document.write( "\n" ); document.write( "    - More Mixture problems\r
\n" ); document.write( "\n" ); document.write( "    - Solving typical word problems on mixtures for solutions \r
\n" ); document.write( "\n" ); document.write( "    - Word problems on mixtures for antifreeze solutions (*)\r
\n" ); document.write( "\n" ); document.write( "    - Word problems on mixtures for alloys \r
\n" ); document.write( "\n" ); document.write( "    - Typical word problems on mixtures from the archive\r
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\n" ); document.write( "\n" ); document.write( "Especially the lesson marked (*) in this list, contains very similar solved problems.\r
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\n" ); document.write( "\n" ); document.write( "Read the lessons and become an expert in solution the mixture word problems.\r
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\n" ); document.write( "\n" ); document.write( "Also, you have this free of charge online textbook in ALGEBRA-I in this site\r
\n" ); document.write( "\n" ); document.write( "    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.\r
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\n" ); document.write( "\n" ); document.write( "The referred lessons are the part of this online textbook under the topic \"Mixture problems\".\r
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\n" ); document.write( "\n" ); document.write( "Save the link to this online textbook together with its description\r
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\n" ); document.write( "\n" ); document.write( "Free of charge online textbook in ALGEBRA-I
\n" ); document.write( "https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson\r
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\n" ); document.write( "\n" ); document.write( "to your archive and use it when it is needed.\r
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