Can you solve this? Question 8. Questions my students have asked.

Continuing my series on the interesting questions that students have asked me, in this article we look at a relatively straightforward (once you see the trick that is) algebraic problem.

If you are interested, you can find all questions from this series, along with a discussion on my inspiration for the series, here.

The problem reads as follows:

Find all real solutions, a, to the equation