Question 1071293
Pieces, x y z


{{{system(x+y+z=81,z=x+34,y=z/2)}}}


The last two equations of the system can be expressed
{{{system(x=z-34,and,y=z/2)}}}
and you can substitute into the first equation of the system:


{{{(z-34)+z/2+z=81}}}
Solve this for z.
.
.
.