document.write( "Question 704921: A chemist prepared 100 mL of 15% saline solution by using a 20% solution, an 18% solution, and 40 mL of a 10% solution. How much of the 20% and 18% were used? Please include an equation for setting this problem up if possible. Thanks! \n" ); document.write( "
Algebra.Com's Answer #434337 by josgarithmetic(39617)\"\" \"About 
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x is how much 18% saline
\n" ); document.write( "y is how much 20% saline\r
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\n" ); document.write( "\n" ); document.write( "The system to solve:
\n" ); document.write( "\"%28x%2A0.18%2By%2A0.20%2B40%2A0.10%29%2F%28100%29=0.15\"
\n" ); document.write( "\"x%2By%2B40=100\"\r
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\n" ); document.write( "\n" ); document.write( "Note that you may work the rational equation into
\n" ); document.write( "18x+20y+40*10=100*15
\n" ); document.write( "18x+20y+400=1500
\n" ); document.write( "\"9x%2B10y%2B200=750\"
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