Пошаговое объяснение:
а)
17/35-х=8/35+3/35
17/35 - x = 11/35
x = 17/35 - 11/35
x = 6/35
б)
у-17/21=19/21-16/21
y - 17/21 = 3/21
y = 3/21 + 17/21
y = 20/21
в)
z+35/49=41/49+39/49.
z + 35/49 = 80/49
z = 80/49 - 35/49
z = 45/49
