document.write( "Question 457662: Suppose that x liters of pure acid (100% acid) are added to 280 liters of a 25% acid solution. How many liters of pure acid should be added to produce a mixture that is 51% acid? \n" ); document.write( "
Algebra.Com's Answer #317127 by jorel1380(3719)\"\" \"About 
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x+280(.25)=.51(280+x)
\n" ); document.write( "x+70=142.8+.51x
\n" ); document.write( ".49x=72.8
\n" ); document.write( "x=72.8/.49=148.57
\n" ); document.write( "You need 148.57 liters of pure acid for your mix..
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