(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Decide the real value of x making Re(10 / x+4i) = 1

2. Relevant equations

I know that you can extend the equation with x-4i.

3. The attempt at a solution

But then the equation looks like this: (10x-40i) / (x^2 + 16) = 1

I don't know how to get rid of the -40i to make it in to a real equation.

Any help would be valuable!

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# Help with equation

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