Пошаговое объяснение:
1 7/9x-1 1/9=4 2/9*(1-x)
1 7/9x - 1 1/9 = 4 2/9 - 4 2/9x
1 7/9x + 4 2/9x = 4 2/9 + 1 1/9
6x = 5 1/3
x = 5 1/3 : 6
x = 16/3 * 1/6
x = 8/9
