document.write( "Question 718142: A solution of 77% vinegar is mixed with a solution of a 25% vinegar to form 312 liters of a 64% solution . How many liters of the 77% solution must be used ? \n" ); document.write( "
Algebra.Com's Answer #440772 by stanbon(75887)\"\" \"About 
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A solution of 77% vinegar is mixed with a solution of a 25% vinegar to form 312 liters of a 64% solution . How many liters of the 77% solution must be used ?
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\n" ); document.write( "Equation:
\n" ); document.write( "0.77x + 0.25(312-x) = 0.64*312
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\n" ); document.write( "77x + 25*312 - 25x = 64*312
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\n" ); document.write( "52x = 39*312
\n" ); document.write( "x = 234 liters (amt. of 77% solution needed)
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\n" ); document.write( "312-234 = 78 liters (amt. 25% solution needed)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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