How would you go about solving an equation like this when all they give you is a equilibrium equation?: Given the standard free energies of formation in Appendix B in the textbook, what is the value of E ^\circ for the cell reaction?

reactants ==> products

dGrxn = (n*dGo products) - (n*dGo reactants)
Then dG0 = -nFEo
n = number of electrons
F = 96,485
Eo = solve for this.