Introductory Algebra for College Students (7th Edition)

$$x = \frac{C - By}{A}$$ The original equation is the general equation of a line.
To solve the equation for $x$, we must isolate $x$: We first subtract $By$ from both sides: $$Ax = C - By$$ We now divide each side by $A$ to isolate $x$: $$x = \frac{C - By}{A}$$ The original equation is the general equation of a line.