document.write( "Question 627826: How much antifreeze should be added to 300 gallons of a 30% antifreeze solution to raise the concentration to 40% \n" ); document.write( "
Algebra.Com's Answer #395153 by reviewermath(1029)\"\" \"About 
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\"%28x+%2B+0.3%28300%29%29%2F%28x+%2B+300%29+=+0.4\"
\n" ); document.write( "\"x+%2B+90+=+0.4x+%2B+120\"
\n" ); document.write( "\"0.6x++=+30\"
\n" ); document.write( "\"x+=+50\"
\n" ); document.write( "Answer: 50 gallons of antifreeze
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