144 - (x : 11 + 21) * 2 = 14
(x : 11 + 21) * 2 = 144 - 14
(x : 11 + 21) * 2 = 130
(x : 11 + 21) * 2 : 2 = 130 : 2
x : 11 + 21 = 65
x : 11 = 65 - 21
x : 11 = 44
x = 44 * 11
x = 484
144 - (484 : 11 + 21) * 2 = 14
144 - (44 + 21) * 2 = 14
144 - (65) * 2 = 14
144 - 130 = 14
14 = 14