# How to solve for x in this equation

1. Apr 23, 2014

### frankivalli

How to solve for "x" in this equation

here is my equation:

Area = $\pi$r$^{2}$ - r$^{2}$(arcos((r-x)/r))+(r-x))*$\sqrt{2*r*x-x^{2}}$

2. Apr 23, 2014

### Staff: Mentor

Is this related to the question you asked in another thread about the height of a liquid in a horizontal, cylindrical tank?

If so, I don't think you can solve the equation above analytically for x. The best you can do is solve it numerically using some approximation technique.

3. Apr 23, 2014