document.write( "Question 611242: How many liters of a 80% acid solution must you mix with 10 liters of a 20% acid solution if you want to end up with a 40% acid solution? \n" ); document.write( "
Algebra.Com's Answer #384866 by stanbon(75887)\"\" \"About 
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How many liters of a 80% acid solution must you mix with 10 liters of a 20% acid solution if you want to end up with a 40% acid solution?
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\n" ); document.write( "Equation:
\n" ); document.write( "acid + acid = acid
\n" ); document.write( "0.80x + 0.20*10 = 0.40(x+10)
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\n" ); document.write( "80x + 20*10 = 40x + 40*10
\n" ); document.write( "40x = 20*10
\n" ); document.write( "x = 5 liters (amt. of 80% solution to be added)
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\n" ); document.write( "cheers,
\n" ); document.write( "Stan H.
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