Решите уравнения: 54 у-36 у-9=153

(15 и - 21) * 3+27=234

(36 т + 98) : 14 = 25

(12u+30u+42) : 6=21

Знак*=Умножить

1) (15u-21) * 3+27=234

(15u-21) * 3=234-7=207

15u-21=207/3=69

15u=69+21=90

u=90/15=6

2) (36t+98) : 14=25

36t+98=25*14=350

36t=350-98=252

t=252/36=7

3) (12u+30u+42) : 6=21

42U+42=21*6=126

42u=126-42=84

u=84/42=2

54 у - 36 у - 9 = 153 (15i - 21) * 3 + 27 = 234

18 у = 153 + 9 45i - 63 + 27 = 234

18 у = 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