Пошаговое объяснение:

1) x + (-1/4) = 0

x = 1/4

2) -x + 1/4 = 0

-x = - 1/4

x = 1/4

3) -1/4 + x = 0

x = 1/4

4) 1/4 + (-x) = 0

-x = -1/4

x = 1/4

5) -x + (-1/4) = 0

-x = 1/4

x = -1/4

6) -1/4 + (-x) = 0

-x = 1/4

x = -1/4