document.write( "Question 1109101: how much water must be evaporated from 65 gallons of a 9% salt solution to make a 12% salt solution? \n" ); document.write( "
Algebra.Com's Answer #724116 by addingup(3677)\"\" \"About 
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0.09(65) = 0.12(65-x)
\n" ); document.write( "5.85 = 7.8-0.12x
\n" ); document.write( "-0.12x = -1.95
\n" ); document.write( "x = -1.95/-0.12 divide, and remember that -/- = + so you can ignore the - sign when you divide, since your answer will be positive anyway. I get that you have to evaporate 16.25 gallons.
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