В каких уравнениях x равен 270?

1. 100 + x = 370

   x = 370 - 100

   x = 270

2. x + 330 = 500

   x = 500 - 330

   x = 170

3. 1 × x = 270

   x = 270 : 1

   x = 270

4. x - 270 = 630

   x = 630 + 270

   x = 900

5. 400 - x = 130

   x = 400 - 130

   x = 270

6. 270 × x = 0

   x = 0 : 270

   x = 0

Ответ: x равен 270 в уравнениях: 100 + x = 370, 1 × x = 270 и 400 - x = 130