Z(2/3+5/6-7/9)=1/2розпешите решение плыз
Z(24/36+30/36-28/36)=1/2 z×13/18=1/2 z=1/2÷13/18 z=1/2×18/13 z=9/13 9/13×13/18=1/2 9/18=1/2 1/2=1/2