document.write( "Question 996315: Lisa has scored
\n" ); document.write( "64
\n" ); document.write( ",
\n" ); document.write( "86
\n" ); document.write( ", and
\n" ); document.write( "84
\n" ); document.write( " on her previous three tests. What score does she need on her next test so that her average (mean) is
\n" ); document.write( "79
\n" ); document.write( "?
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Algebra.Com's Answer #614801 by Alan3354(69443)\"\" \"About 
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Lisa has scored
\n" ); document.write( "64
\n" ); document.write( ",
\n" ); document.write( "86
\n" ); document.write( ", and
\n" ); document.write( "84
\n" ); document.write( " on her previous three tests. What score does she need on her next test so that her average (mean) is
\n" ); document.write( "79
\n" ); document.write( "?
\n" ); document.write( "===========
\n" ); document.write( "64 + 86 + 84 = 234
\n" ); document.write( "---
\n" ); document.write( "79*4 = 316
\n" ); document.write( "316 - 234 = what she needs.
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