document.write( "Question 557636: Francis averaged 78 (out of 100) on his first three exams. What score will Francis need on his fourth exam to bring his average up to 80? \n" ); document.write( "

Algebra.Com's Answer #362693 by rfer(16322) $\"\"$ $\"About$

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(78+78+78+x)/4=80
\n" ); document.write( "234+x=80*4
\n" ); document.write( "x=86 \n" ); document.write( "

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