Question 1131390


{{{-1/3 + 2z= -5/6}}}


{{{-1/3+1/3 + 2z= 1/3-5/6}}}


{{{-cross(1/3)+cross(1/3) + 2z= (1*2)/(3*2)-5/6}}}


{{{ 2z= 2/6-5/6}}}


{{{ 2z= (2-5)/6}}}


{{{ 2z= -3/6}}}


{{{ 2z= -1/2}}}


{{{ z= (-1/2)/2}}}


{{{ z= -1/4}}}