В)
х - 1/4 = - 1/2
х= - 1/2 + 1/4 = - 2/4 + 1/4
х = - 1/4
проверим:
- 1/4 - 1/4 = - 1/2
- 2/4 = - 1/2
- 1/2 = - 1/2
е)
1/6 - х = - 4/9
х = 1/6 - (-4/9) = 1/6 + 4/9 = 3/18 + 8/18
х= 11/18
проверим:
1/6 - 11/18 = - 4/9
3/18 - 11/18 = - 4/9
- 8/18 = - 4/9
- 4/9 = - 4/9