document.write( "Question 1090192: Question\r
\n" ); document.write( "\n" ); document.write( "A researcher wants a 72 ounce saline solution with a concentration of 7%. She has concentrations of 2% and 14%. How much of each solution must she use to get the desired concentration? \n" ); document.write( "

Algebra.Com's Answer #704610 by ikleyn(52786) $\"\"$ $\"About$

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document.write( "The equation is\r\n" );
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document.write( "0.02*x + 0.14*(72-x) = 0.07*72.   (x = the volume of the 2% solution, in mL).\r\n" );
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document.write( "You need to understand why it is so, but is is SO EASY . . . !\r\n" );
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document.write( "    Both sides of the equation represent the balance of the salt mass in the solutions.\r\n" );
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document.write( "To solve the equation,  multiply its both sides by 100 to get it in more easy form. You will get\r\n" );
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document.write( "2x + 14(72 -x) = 504.\r\n" );
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document.write( "Now simplify and solve for x.\r\n" );
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document.write( "I leave it to you to complete the solution.\r\n" );
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\n" ); document.write( "\n" ); document.write( "There is entire bunch of introductory lessons 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
\n" ); document.write( "\n" ); document.write( "in this site.\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 textbook in the section \"Word problems\" under the topic \"Mixture problems\".\r
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