Решите уравнение 13+10t=163,9y-54=162, 181-8r=45

13+10t=163

10t = 163 - 13

10t = 150

t = 150 : 10

t = 15

9y-54=162

9y = 162 + 54

9y = 216

y = 216 : 9

у = 24

181-8r=45

-8r = 45 - 181

-8r = - 136

r = - 136 : (-8)

r = 17

13+10t=163.

10t = 163-13.

10t = 150.

t = 150:10.

t = 15.

9y-54 = 162.

9y = 162+54

9y = 216.

y = 216:9.

y = 24.

181-8r = 45

-8r = 45-181.

-8r = - 136

r = - 136: (-8).

r = 17. Не так? Здесь нет никаких скобок?