Question 1125416
p, covered pavillion seats
L, Lawn seats

{{{system(p+L=1600,20p+10L=22000)}}}


{{{system(p+L=1600,2p+L=2200)}}}


Solve any way you want or need.


You might be able to see the simplified system step in your head, p=600.
(and therefore L=1000).