How about: 2 plus 5 equals 7 as one example
511
16
5*7
31
8 and 4, added together and multiplied by 7
511
16
5*7
260 and 7
21 and 7
31
15
The numbers are: (-7+sq rt 13)/2 and -(7+sq rt 13)/2
-313
3 1/3+2 1/7=
It is not possible to find out the average of a number without knowing how many numbers were added together to get said number. If there were say, 7 numbers added together to get the total of 27.352, then you would divide 27.352 by 7 to get the average.
The answer to the equation 5 plus 7 is 12. When numbers are being added, the answer is called the sum.