document.write( "Question 1122279: What is the average (arithmetic mean) of x, x+3, x-4, and x+7 ?\r
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Algebra.Com's Answer #738362 by rothauserc(4718)\"\" \"About 
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x +x+3 +x-4 +x+7 = 4x+6
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\n" ); document.write( "arithmetic mean = (4x+6) /4 = (2x+3)/2
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