document.write( "Question 363297: What quantity of 70 percent acid solution must be mixed with a 20 percent solution to produce 900 mL of a 50 percent solution? \n" ); document.write( "
Algebra.Com's Answer #259041 by robertb(5830)\"\" \"About 
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\"0.70x%2B+0.20%28900-x%29+=+0.50%2A900\",
\n" ); document.write( "\"0.70x+%2B+180+-+0.20x+=+450\",
\n" ); document.write( "\"0.50x+=+270\",
\n" ); document.write( "\"x+=+540\"mL, the amount of 70% solution that must be added.
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