Пошаговое объяснение:
.
5/12z - 5/4 = 1/3z - 7/6 + 2
5/12z - 1/3z = -7/6 + 2 + 5/4
5/12z - 4/12z = -14/12 + 24/12 + 15/12
1/12z = 25/12
z = 25/12 * 12
z = 25
