document.write( "Question 210259: What quantity of 60 per cent acid solution must be mixed with a 25 percent solution to produce 252 mL of a 50 per cent solution? \n" ); document.write( "
Algebra.Com's Answer #158865 by Alan3354(69443)\"\" \"About 
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What quantity of 60 per cent acid solution must be mixed with a 25 percent solution to produce 252 mL of a 50 per cent solution?
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\n" ); document.write( "s = 60%
\n" ); document.write( "t = 25%
\n" ); document.write( "s+t = 252 (amount of solution)
\n" ); document.write( "0.6s + 0.25t = 0.5*252 (amount of acid)
\n" ); document.write( "t = 252-s
\n" ); document.write( "Sub for t
\n" ); document.write( "0.6s + 0.25(252-s) = 126
\n" ); document.write( "0.6s + 63 - 0.25s = 126
\n" ); document.write( "0.35s = 63
\n" ); document.write( "s = 180 ml
\n" ); document.write( "t = 72 ml
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