7 11/15 - (x - 3 4/15)= 2 8/15
x - 3 4/15 = 7 11/15 - 2 8/15
x - 3 4/15 = 5 3/15
x = 5 3/15 + 3 4/15
x = 8 7/15
Ответ: 8 7/15
7 11/15 - (x - 3 4/15)= 2 8/15
x - 3 4/15 = 7 11/15 - 2 8/15
x - 3 4/15 = 5 3/15
x = 5 3/15 + 3 4/15
x = 8 7/15
Ответ: 8 7/15