2/3-(2/9+x)=1/3 решите уравнение

cпс

2/3 - ( 2/9 + x ) = 1/3 ; 2/3 - 2/9 - x = 1/3 ; 4/9 - x = 1/3 ; -x = 1/3 - 4/9 ; -x = - 1/9 ; x = 1/9