document.write( "Question 160137: If you earn a score of 72% on one exam and a score of 85% on another exam, what will you need to earn on the next exam so that your average for the three exams is 80%? \n" ); document.write( "
Algebra.Com's Answer #118103 by nabla(475)\"\" \"About 
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(.72+.85+x)/3=.8
\n" ); document.write( "1.57+x=2.4
\n" ); document.write( "x=.83.\r
\n" ); document.write( "\n" ); document.write( "You need an 83%.
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