(32 - x) * 6 - 39 = 45;
(32 - x) * 6 = 45 + 39;
(32 - x) * 6 = 84;
32 - x = 84 : 6;
32 - x = 14;
x = 32 - 14;
x = 18.
(32 - x) * 6 - 39 = 45;
(32 - x) * 6 = 45 + 39;
(32 - x) * 6 = 84;
32 - x = 84 : 6;
32 - x = 14;
x = 32 - 14;
x = 18.