document.write( "Question 560092: Suppose your grades on three english exams are 80, 93, and 91. What grade do you need on your next exam to have a 90 average on the four exams? \n" ); document.write( "

Algebra.Com's Answer #363664 by josmiceli(19441) $\"\"$ $\"About$

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Let grade on next exam = $\"x\"$
\n" ); document.write( "given:
\n" ); document.write( " $\"+%28+80+%2B+93+%2B+91+%2B+x+%29+%2F+4+=+90+\"$
\n" ); document.write( " $\"+80+%2B+93+%2B+91+%2B+x+=+360+\"$
\n" ); document.write( " $\"+264+%2B+x+=+360+\"$
\n" ); document.write( " $\"+x+=+360+-+264+\"$
\n" ); document.write( " $\"+x+=+96+\"$
\n" ); document.write( "A 96 is needed to average 90 for the 4 exams \n" ); document.write( "

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