document.write( "Question 654009: Ken received grades of 90,88,and 75 on three tests. What grade must he receive on the next test
\n" ); document.write( "so that his average for these four tests is 85?
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Algebra.Com's Answer #408581 by checkley79(3341)\"\" \"About 
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(90+88+75+X)/4=85
\n" ); document.write( "(253+X)/4=85 CROSS MULTIPLY.
\n" ); document.write( "253+X=4*85
\n" ); document.write( "253+X=340
\n" ); document.write( "X=340-253
\n" ); document.write( "X=87 ANS. FOR THE FINAL TEST GRADE.
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