The pages of a report are numbered consecutively from 1 to 13. If the sum of the page numbers up to and including page number x of the report is equal to one less than the sum of the page numbers following page number x, then x =	Choose the correct option:
A) 5
B) 6
C) 7
D) 8
E) 9
sum of the first few numbers =1+2+3+4+5+6+7+8+9= 
<gadget id="calculator">1+2+3+4+5+6+7+8+9</gadget>
<output>45</output>
45   sum of the last few= 10 +11+12+13= 
<gadget id="calculator">10 +11+12+13</gadget>
<output>46</output>
46 page no.9 answer .9
<result>E</result>
The pages of a report are numbered consecutively from 1 to 13. If the sum of the page numbers up to and including page number x of the report is equal to one less than the sum of the page numbers following page number x, then x =