## Introductory Algebra for College Students (7th Edition)

$$m = \frac{E}{c^{2}}$$ This is Albert Einstein's formula to describe his theory of relativity.
To solve for $m$, you need to isolate $m$ by itself. You do this by dividing by $c^{2}$ on both sides: $$E = mc^{2}$$ $$\frac{E}{c^{2}} = m$$ $$m = \frac{E}{c^{2}}$$ This is Albert Einstein's formula to describe his theory of relativity.