Question 1104160
g, t, z
Gorillas, Tigers, Zebras

Not clear what you want with {{{r}}}.


The description gives this system:
{{{system(g/t=4,t=z+4)}}}

(or maybe  {{{system(g/r=4,r=z+4)}}})


Find g.
{{{g=4t}}}
{{{g=4(z+4)}}}
{{{g=4z+16}}}
-
Maybe you want r for number of tigers.
{{{r=z+4}}}
{{{z=r-4}}}
-
{{{g=4(r-4)+16}}}
{{{4r-16+16}}}
{{{g=4r}}}