_________Vic______S.A_________W.A

G_______a=b+d_____b_________e+1=d+1

S________c________c__________d+2

B_______e=d_______b___________d

a=b+d

b+e+1-1=b+d

e=d

4b+4d=6b+3c

4d=2b+3c

I set it out this way. I think I interpreted all the information correctly. There is of course one more equation: the sum of all the elements of the table should equal 186.