###### Example3.3.3

Solve for $$R$$ in $$P=R-C\text{.}$$ (This is the relationship between profit, revenue, and cost.)

To solve for $$R\text{,}$$ we first want to note that $$C$$ is subtracted from $$R\text{.}$$ To “undo” this, we will need to add $$C$$ to each side of the equation: