document.write( "Question 1041231: Find x if the sequence m,x,n is an arithmetic
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Algebra.Com's Answer #656201 by josgarithmetic(39618)\"\" \"About 
You can put this solution on YOUR website!
You need a sensible description. You only have:
\n" ); document.write( "d may be common difference;
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\n" ); document.write( "Sequence for the first three terms is m, m+d, m+2d
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