3
Пошаговое объяснение:
3/5 * (2 7/9s +3 1/3) - 1/6s = 6.5
5/3s + 2 - 1/6s = 6.5
9/6s = 6.5 - 2
1.5s = 4.5
s = 3
3
Пошаговое объяснение:
3/5 * (2 7/9s +3 1/3) - 1/6s = 6.5
5/3s + 2 - 1/6s = 6.5
9/6s = 6.5 - 2
1.5s = 4.5
s = 3