If we were talking about f of x over there, we wouldn't be able to put negative 2x plus 3. We'd have to have some form of equation for these circles. But right over here, this is what f of x is, and now we can solve this pretty straightforwardly. So we could subtract 3 from both sides. And we get negative 2x is equal to negative 5. Divide both sides by negative 2. You get x is equal to negative 5 over negative 2, which is equal to 5 halves, which is exactly what we thought it was when we looked at it visually.