х = -1 2/9
Пошаговое объяснение:
7(х+2/3)+1/3=4(х+1/3)
7х+14/3+1/3 = 4х+4/3
7х+15/3 = 4х+4/3
7х-4х = -15/3+4/3
3х = -11/3
х = -11/3 : 3
х = -11/9 = -1 2/9
