12 * а + b) * 2/3 - С, если а = 5/18, б = 2/3, с = 1 1/3
(12×5/18+2/3)×2/3-1 1/3=5/3+2/3=7/3×2/3=14/9-4/3=14-12/9=2/9
12 * а + b) * 2/3 - С, если а = 5/18, б = 2/3, с = 1 1/3
(12×5/18+2/3)×2/3-1 1/3=5/3+2/3=7/3×2/3=14/9-4/3=14-12/9=2/9