document.write( "Question 760405: A student scored 67, 81, and 98 on three algebra tests.What must he score on the fourth test in order to have an average grade of at least 85? \n" ); document.write( "

Algebra.Com's Answer #462617 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+x+\"$ = the grade she needs
\n" ); document.write( " $\"+%28+67+%2B+81+%2B+98+%2B+x+%29+%2F+4+=+85+\"$
\n" ); document.write( " $\"+%28+246+%2B+x+%29+%2F+4+=+85+\"$
\n" ); document.write( " $\"+246+%2B+x+=+4%2A85+\"$
\n" ); document.write( " $\"+x+=+340+-+246+\"$
\n" ); document.write( " $\"+x+=+94+\"$
\n" ); document.write( "He must score 94 in order to average 85
\n" ); document.write( " \n" ); document.write( "

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