i do believe t's 49
18 + 13 = 31
32+14+20+18+16+31+21+16=168
4x + 27x + 18 = 0 31x + 18= 0 31x + 18 - 18= 0 - 18 31x = -18 31x / 31 = -18 / 31 x = -.58
-13
18 + 13= 31
-18
6-3a**2+7+4a-5a+18 3a**2-1a+31
This is only true if x = -31.
8/9 + 5/6 = 16/18 + 15/18 = 31/18
The mathematical statement 31 plus 31 would have an answer of 62.
8/9+5/6 is 31/18.
It is simply 18:31.