Solving $Ae^x=Bx$ analytically, where $A$ and $B$ are constants?

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This equation mixes both exponential terms and linear terms, something which I do not know how to deal with. Any pointers?

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$$-xe^{-x}=-\dfrac{A}{B}$$ Thus, $$x=-W\left(-\dfrac{A}{B}\right)$$ Where $W$ is the Lambert W-function.