всё во вложении........
3 7/17 - (х + 1 4/17) = 1 9/17
58/17 - (х + 21/17) = 26/17
58/17 - х - 21/17 = 26/17
37/17 - х = 26/17
- х = 26/17 - 37/17
- х = - 11/17
х = 11/17
всё во вложении........
3 7/17 - (х + 1 4/17) = 1 9/17
58/17 - (х + 21/17) = 26/17
58/17 - х - 21/17 = 26/17
37/17 - х = 26/17
- х = 26/17 - 37/17
- х = - 11/17
х = 11/17