document.write( "Question 309518: how many milliliters of a 20% solution should be added to a 50 milliliters of 40% solution to obtain 25% solution? \n" ); document.write( "
Algebra.Com's Answer #221378 by stanbon(75887)\"\" \"About 
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how many milliliters of a 20% solution should be added to a 50 milliliters of 40% solution to obtain 25% solution?
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\n" ); document.write( "Equation:
\n" ); document.write( "active + active = active
\n" ); document.write( "0.40*50 + 0.20x = 0.25(50+x)
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\n" ); document.write( "Multiply thru by 100 to get:
\n" ); document.write( "40*50 + 20x = 25*50 + 25x
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\n" ); document.write( "5x = 15*50
\n" ); document.write( "x = 150 milliliters (amt. of 20% solution needed in the mixture)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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