document.write( "Question 937446: how many fl. oz. of a 20% acid solution must be mixed with 9 fl. oz. of a 40% acid solution to make a 35% solution \n" ); document.write( "
Algebra.Com's Answer #570828 by TimothyLamb(4379)\"\" \"About 
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x = oz of 20% acid
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\n" ); document.write( "0.20x + 0.40*9 = 0.35*(x + 9)
\n" ); document.write( "0.20x + 3.6 = 0.35x + 3.15
\n" ); document.write( "0.35x - 0.20x = 3.6 - 3.15
\n" ); document.write( "0.15x = 0.45
\n" ); document.write( "x = 0.45/0.15
\n" ); document.write( "x = 3
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\n" ); document.write( "answer:
\n" ); document.write( "3 fl.oz. of 20% acid
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