Question: solve nonlinear equation with erf function numerically

This question is related to the Question numerically solved one non-linear equation in presence of units

Following the last question: After eliminating the units, the equation is still not solved. Such kind of equation is not solvable at all, even numerically? Thanks.

PS: Is it possible to edit a posted question? Sometime I want to add more information but could not edit the old one.

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