aiymjanabay2001

Ответ:

х: 7 = 330 – 274

x/7=56

x=56/7

x=8

(502 - 2) a = 1000

500*a=1000

a=1000/500

a=2

x + 30 . 5 = 365

x+150=365

x=365-150

x= 215

х: 4 = 100 - 22

x/4=78

x=78*4

x=312