4 1/7 - (3 2/7 - x) = 1 3/7
3 2/7 - x = 4 1/7 - 1 3/7
3 2/7 - x = 2 5/7
x = 3 2/7 - 2 5/7
x = 4/7
ответ: 4/7
4 1/7 - (3 2/7 - x) = 1 3/7
3 2/7 - x = 4 1/7 - 1 3/7
3 2/7 - x = 2 5/7
x = 3 2/7 - 2 5/7
x = 4/7
ответ: 4/7