Answer:
The answer is -2.
Step-by-step explanation:
This is because if you plug in any number for x, they will always equal each other.
It's difficult to make out, but I think the task is to expand

Write the number in polar form first:

By DeMoivre's theorem, you have

and converting back to Cartesian form, this number is equivalent to
Hi there!
Okay, so here are the steps to solving:
1) Simplify both sides of the equation.
-1/40x = -9
2) Multiply both sides by 40/(-1).
(40/-1) * (-1/40x) = (40/-1) * (-9)
x = 360
The final answer is x = 360.
Hope this helps!