1. **State the problem:** Find the value of $a$ given the equation or context (not provided explicitly, so assuming a typical algebraic problem). 2. **Formula and rules:** To find $a$, we typically isolate $a$ on one side of the equation using inverse operations such as addition, subtraction, multiplication, or division. 3. **Intermediate work:** Since the exact equation is not provided, let's assume a general form $ax = b$. To solve for $a$, divide both sides by $x$: $$a = \frac{b}{x}$$ 4. **Explanation:** Dividing both sides by $x$ isolates $a$. The division cancels $x$ on the left side, leaving $a$ alone. 5. **Final answer:** $a = \frac{b}{x}$ (replace $b$ and $x$ with actual values if given). Note: Since the user provided multiple questions but the GUEST RULE requires solving only the first, this is the solution for the first question.