document.write( "Question 354034: A dehydrated patient needs a 3.6% saline IV. Unfortunately, the hospital only has bags of 2% and 4% saline solutions. How many liters of each of these solutions should be mixed together to yield 1 liter of the desired concentration? \n" ); document.write( "
Algebra.Com's Answer #253068 by sofiyac(983)\"\" \"About 
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Let x be the number of liters of 2% saline solution. Since the desired product is 1 liter solution, then the number of liters of 4% saline solution will be 1-x.
\n" ); document.write( "\"+2x%2B4%281-x%29=3.6%2A1+\" simplify
\n" ); document.write( "\"+2x%2B4-4x=3.6+\" combine like terms
\n" ); document.write( "\"+-2x%2B4=3.6+\" subtract 4 from each side
\n" ); document.write( "\"+-2x=3.6-4+\"
\n" ); document.write( "\"+-2x=-0.4+\" divide both sides by -2
\n" ); document.write( "\"+x=0.2+\" so we will need 0.2 liters of the 2% solution, and 1-0.2=0.8 liters of the 4% solution.
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