document.write( "Question 680902: Joyce has 42 liters of 40% saline solution in a container and plans to add a certain amount of a 10% solution to weaken the saline concentration to 24%. How many liters of the 10% solution should she add? \n" ); document.write( "
Algebra.Com's Answer #422503 by lwsshak3(11628)\"\" \"About 
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Joyce has 42 liters of 40% saline solution in a container and plans to add a certain amount of a 10% solution to weaken the saline concentration to 24%. How many liters of the 10% solution should she add?
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\n" ); document.write( "let x=amt of 10% solution to add
\n" ); document.write( "42+x=amt of final 24% solution
\n" ); document.write( "..
\n" ); document.write( "40%*42+10%x=24%(42+x)
\n" ); document.write( "16.8+.1x=10.08+.24x
\n" ); document.write( ".14x=6.72
\n" ); document.write( "x=6.72/.14
\n" ); document.write( "x=48
\n" ); document.write( "amt of 10% solution to add=48 liters
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