Пошаговое объяснение:
2/3:(2/3*x-2/3)=4/3
2/3*x - 2/3 = 2/3 : 4/3
2/3*x - 2/3 = 2/3 * 3/4
2/3*x - 2/3 = 1/2
2/3*x = 1/2 + 2/3
2/3*x = 3/6+4/6
2/3*x = 7/6
x = 7/6 * 3/2
x = 7/4
x = 1целая 3/4
