e.

To dive a little deeper into the world of equations, let’s consider how linear functions can describe real-world scenarios! For instance, if we rearrange your equation into a more familiar linear form , we can interpret as the slope which tells us how steep the line is, and as the y-intercept where the line crosses the y-axis. Imagine this line representing a budget: as you increase the variable , your total expenses (or profits) change according to that slope.

Now, when manipulating equations like this, a common mistake is forgetting to distribute terms correctly! In your case, simplifying requires being mindful of each step: distribute the 4 to both terms in the parentheses and combine like terms properly. Missing a sign or a term can change the meaning completely, so double-check each part!