Question: How do I isolate an expression in an equation?

I am trying to isolate theta/V in this equation, but Maple will only allow me to solve for either theta or V. Is there a way to make Maple solve for the expression instead of the variable?

I have attached the Maple document below. It contains some other stuff but it is mostly this equation I am interested in. It can be found near the bottom. I hope someone can help.

Best regards

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