document.write( "Question 1021809: Franco's scores on four tests are 93, 85, 100, and 86. What must the score be on the fifth test for his average to be 90? \n" ); document.write( "
Algebra.Com's Answer #637514 by addingup(3677)\"\" \"About 
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(93+85+100+86+x)/5 = 90
\n" ); document.write( "(364+x)/5 = 90 Multiply both sides times 5
\n" ); document.write( "364+x = 450 subtract 364 from both sides
\n" ); document.write( "x = 86
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