I've been trying to solve this economics question with infinite series, where we need to use the following two equations to find D1 and G, which is pretty straight-forward as there are two equations and 2 unknowns. I've tried isolating D1 from the first equation to input it into the second equation, getting me the following:
$(0.05-g)\sum_{n=1}^\infty \frac{(1+g)^{n-1}}{(1.05)^n} = 26$
Now, I'm stuck. All I need is g to get D1, but I don't know what to do to get g, can someone tell me how I can do this?