a.

Let’s solve for step by step! First, we can simplify the equation by subtracting 12 from both sides, yielding or simply . Next, to isolate , just divide both sides by 3, leading us to . Voila! You’ve successfully solved the equation.

Now, if you ever come across equations like this in daily life, think of them as balancing scales. Whatever you do to one side, you must do to the other to keep it balanced. Whether you’re budgeting, cooking, or solving for unknowns in school, the principle remains the same!