30000 - (6000 + u) = 17000
6000 + u = 30000 - 17000
6000 + u = 13000
u = 13000 - 6000
u = 7000
Проверка: 30000 - (6000 + 7000) = 17000
30000 - 13000 = 17000
17000 = 17000
(v - 600) + 8000 = 9600
v - 600 = 9600 - 8000
v - 600 = 1600
v = 1600 + 600
v = 2200
Проверка: (2200 - 600) + 8000 = 9600
1600 + 8000 = 9600
(52000 - w) - 700 = 48300
52000 - w = 48300 + 700
52000 - w = 49000
w = 52000 - 49000
w = 3000
Проверка: (52000 - 3000) - 700 = 48300
49000 - 700 = 48300
48300 = 48300