document.write( "Question 280927: How many gallons of 20% saline solution should be mixed with 12 gallons of pure water to make a 15% saline? \n" ); document.write( "
Algebra.Com's Answer #204140 by checkley77(12844)\"\" \"About 
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.20x=.15(12+x)
\n" ); document.write( ".20x=1.8+.15x
\n" ); document.write( ",20x-.15x=1.8
\n" ); document.write( ".05x=1.8
\n" ); document.write( "x=1/8/.05
\n" ); document.write( "x=36 gallons of saline solution is needed.
\n" ); document.write( "Proof:
\n" ); document.write( ".20*36=.15(12+36)
\n" ); document.write( "7.2=.15*48
\n" ); document.write( "7.2=7.2
\n" ); document.write( "
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