179. Реши уравнения. x + 60 = 2000 : 8 720 : x = 20 350 : x = 50 x · 30 = 150

Решение:

1. x + 60 = 2000 : 8
   x + 60 = 250
   x = 250 - 60
   x = 190
2. 720 : x = 20
   x = 720 : 20
   x = 36
3. 350 : x = 50
   x = 350 : 50
   x = 7
4. x · 30 = 150
   x = 150 : 30
   x = 5

Ответ: x = 190, x = 36, x = 7, x = 5.