Exponential equations solving methods?

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Do you have an idea or general method to solve the following equation?: $$a^{\alpha x}+b^{\beta x} = c^{\gamma x}+ d^{\delta x}$$ when $a,b,c,d$ aren't zero, and $\alpha, \beta, \gamma, \delta$ are real numbers.
The cause of this question was a particular problem found in this site. Thanks for suggestions!