8. X - 40 : 8 = 19
X/ 5 + 12 = 14
X + 8 = 18
18 + X = 23
X + 8 = 13
7 + X - 11 + 8 = 7
5 . X + 7 = 22
2 . X + 5 = 11
X + 42 - 8 = 37
X + 20/2 = 30
X + 90 = 110
X - 8 : 4 = 3
2 . X + 19 = 39
X - 20 = 0
X + 50 = 70
X + 20 : 2 = 20
X / 2 + 5 = 10
X + 50 = 55
X/2 + 15 = 25
2. X + 5 = 15