Add TOC entry to examples.html for systems_of_equations_ex9
Add TOC entry to examples.html for systems_of_equations_ex9

BalticPinguin/libmesh,BalticPinguin/libmesh,jwpeterson/libmesh,BalticPinguin/libmesh,dschwen/libmesh,roystgnr/libmesh,roystgnr/libmesh,roystgnr/libmesh,roystgnr/libmesh,dschwen/libmesh,jwpeterson/libmesh,libMesh/libmesh,roystgnr/libmesh,BalticPinguin/libmesh,libMesh/libmesh,jwpeterson/libmesh,libMesh/libmesh,jwpeterson/libmesh,roystgnr/libmesh,jwpeterson/libmesh,libMesh/libmesh,BalticPinguin/libmesh,BalticPinguin/libmesh,libMesh/libmesh,jwpeterson/libmesh,jwpeterson/libmesh,dschwen/libmesh,libMesh/libmesh,roystgnr/libmesh,jwpeterson/libmesh,BalticPinguin/libmesh,libMesh/libmesh,dschwen/libmesh,dschwen/libmesh,BalticPinguin/libmesh,dschwen/libmesh,libMesh/libmesh,dschwen/libmesh,dschwen/libmesh,roystgnr/libmesh