(c - 144) * 5 = 1140 * 2;
(c - 144) * 5 = 2280;
c - 144 = 2280 : 5;
c - 144 = 456;
c = 456 + 144;
c = 600.
(c - 144) * 5 = 1140 * 2;
(c - 144) * 5 = 2280;
c - 144 = 2280 : 5;
c - 144 = 456;
c = 456 + 144;
c = 600.