x = 3/4
Пошаговое объяснение:
(2 8/9:1 4/9-2/3)*х=1
(26/9 * 9/13 - 2/3)*x = 1
( 2 - 2/3)*x = 1
1 1/3x = 1
x = 1 : 1 1/3
x = 1 * 3/4
