123
84 + 39 = 123 84- 39 = 45 84 + 39 = 123 84- 39 = 45
123
The sum of 622 and 84 is 706.
39/84 = 13/28
The sum of -18 and 39 is 21.
In math term it would be 45
LCM(84, 39) = 1092
39.
89
73-39+84 = 117
In the problem 56 + 28 = 84, 84 is the sum.
If two prime number have a sum of 54 they cannot have a sum of 84, and conversely.