document.write( "Question 353498: how much 60% antifreeze solution must be mixed with a 40% antifreeze solution to produce 25 gallons of a 52% disinfectant solution. \n" ); document.write( "
Algebra.Com's Answer #252586 by robertb(5830)\"\" \"About 
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let x = # gallons 60% antifreeze sol'n that has to be added. Then
\n" ); document.write( "\"0.60x+%2B+0.40%2A%2825+-+x%29+=+0.52%2A25\",
\n" ); document.write( "\"0.60x+%2B+10+-+0.40x+=+13\",
\n" ); document.write( "\"0.20x+=+3\",
\n" ); document.write( "\"x+=+3%2F0.20+=+15\".
\n" ); document.write( "Therefore 15 gallons of 60% antifreeze has to be added.
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