document.write( "Question 1094517: Seth scored an 82%, 88%, and 75% on three tests. What score must he get on the fourth test to bring his average to 80%? \n" ); document.write( "
Algebra.Com's Answer #709084 by addingup(3677)\"\" \"About 
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(82+88+75+x)/4 = 80
\n" ); document.write( "(245+x)/4 = 80
\n" ); document.write( "245+x = 320
\n" ); document.write( "x = 75 <-- this is the grade he needs to get on the 4th test.
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