document.write( "Question 693921: How many liters of each of a 15% acid solution and a 75% acid solution must be used to to produce 90 liters of a 25% acid solution? ( round to two decimal places if necessary.) \n" ); document.write( "
Algebra.Com's Answer #427628 by stanbon(75887)\"\" \"About 
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How many liters of each of a 15% acid solution and a 75% acid solution must be used to to produce 90 liters of a 25% acid solution? ( round to two decimal places if necessary.)
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\n" ); document.write( "Equation:
\n" ); document.write( "acid + acid = acid
\n" ); document.write( "0.15x + 0.75(90-x_ = 0.25*90
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\n" ); document.write( "15x + 75*90 - 75x = 25*90
\n" ); document.write( "-80x = -50*90
\n" ); document.write( "x = (5/8)90
\n" ); document.write( "x = 56.25 liters (amt. 15% solution needed)
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\n" ); document.write( "90-x + 33.75 liters (amt. of 75% solution needed)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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