document.write( "Question 1122261: A pharmacist wishes to mix a solution that is 5% Minoxidil. She has on hand 70 ml of a 2% solution and wishes to add some 7% solution to obtain the desired 5% solution. How much 7% solution should she add?
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Algebra.Com's Answer #738333 by ikleyn(52788) $\"\"$ $\"About$

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document.write( "Let x = \"How much 7% solution should she add\".\r\n" );
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document.write( "Your equation is\r\n" );
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document.write( "    pure Minoxidil + pure Minoxidil = total pure Minoxidil.\r\n" );
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document.write( "    0.02*70        + 0.07*x         = 0.05(x + 70).\r\n" );
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document.write( "    ====>            0.07x          = 0.05x + 0.05*70 - 0.02*70\r\n" );
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document.write( "                     0.07x  - 0.05x = 0.05*70 - 0.02*70\r\n" );
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document.write( "                     0.02x          = 0.03*70  ====>  x =  = 105.\r\n" );
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document.write( "Answer.  105 mL of the 7% solution should be added.\r\n" );
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document.write( "Check.   0.02*70 + 0.07*105 = 8.75 pure Minoxidil.\r\n" );
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document.write( "         0.05*(70 + 105) = 8.75 pure Minoxidil.    ! Correct !\r\n" );
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\n" ); document.write( "\n" ); document.write( "Introductory lessons in this site, covering various types of mixture problems, are\r
\n" ); document.write( "\n" ); document.write( "    - Mixture problems\r
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\n" ); document.write( "\n" ); document.write( "Read them 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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