document.write( "Question 117394: A student has scores of 87, 81, and 88 on the first 3 of 4 test. If the student wants to an average of exactly 87, what score must she earn on the fourth test \n" ); document.write( "
Algebra.Com's Answer #85448 by Fombitz(32388)\"\" \"About 
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Let T be the test score on the fourth test.
\n" ); document.write( "\"%2887%2B81%2B88%2BT%29%2F4=87\"
\n" ); document.write( "\"266%2BT=348\"
\n" ); document.write( "\"T=92\"
\n" ); document.write( "The student needs to get exactly a 92 to get exactly an 87 average.
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