If the solution of an equation is x=-2 what could the original equation be?

You can formulate anything here as long as you can substitute x for - 2 and you get the right answer (IE both sides of the equation balance).

Examples:

x + 2 = 0

x + 4 = 2

or even something like

x + y = - 2 - y

There are an infinite number of possibilities.

Here's one:

6x + 107 = - 77x - 59