document.write( "Question 232904: how many liters of a 15 percent salt solution must be added to 2 liters of 30 percent to make a mixture of 18 percent salt solution? \n" ); document.write( "
Algebra.Com's Answer #172005 by checkley77(12844)\"\" \"About 
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.30*2+.15x=.18(2+x)
\n" ); document.write( ".60+.15x=.36+.18x
\n" ); document.write( ".15x-.18x=.36-.60
\n" ); document.write( "-.03x=.24
\n" ); document.write( "x=-.24/-.03
\n" ); document.write( "x=8 liters of 15% salt solution is used.
\n" ); document.write( "Proof:
\n" ); document.write( ".30*2+.15*8=.18(2+8)
\n" ); document.write( ".60+1.2=.18*10
\n" ); document.write( "1.8=1.8\r
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