The answer is 40.
18 + 2 + 10 = 30
-2 + 18 + -5 = 11
13 plus -8 = 5 ... and -18 plus -2 = -20.
18 + 32 = 50 50 +2 = 52 52 + 2 = 54
2
2 + 18 = 20
-a + 2 = 18 - 2 = - 2 --------------- - a = 16 a = - 16
-2 + (-18) = -20
2 + 18 +38 = 58
-18
18 + 2 / 4 = 18 + .5 = 18.5