54у - 36у - 9 = 153 (15i - 21) * 3 + 27 = 234
18у = 153 + 9 45i - 63 + 27 = 234
18у = 162 45i - 36 = 234
у = 162 : 18 45i = 234 + 36 = 270
у = 9 i = 270 : 45
i = 6
(36t + 98) : 14 = 25 (12u + 30u + 42) : 6 = 21
36t + 98 = 25 * 14 12u + 30u + 42 = 21 * 6
36t = 350 - 98 42u + 42 = 126
36t = 252 42u = 126 - 42 = 84
t = 252 : 36 u = 84 : 42
t = 7 u = 2
54у-36у-9=153 (15u-21)*3+27=234 (36t+98)\14=25
18y=153+9 45u-63=234-27 36t+98=25*14
18y= 162 45u=207+63 36t=350-98
y=162/18 45u=270 36t=252
y= 9 u=270/45 t=252/36
u=6 t=7
(12u+30u+42)\6=21
42u+42=21*6
42u= 126-42
42u= 84
u=84/42
u= 2