1. The problem is to solve for $d$ given an equation or context (not provided explicitly). 2. Since the problem statement is incomplete, let's assume a common algebraic context where $d$ is isolated. 3. For example, if the equation is $ad + b = c$, the formula to solve for $d$ is: $$d = \frac{c - b}{a}$$ 4. Important rules: - You can add or subtract the same value on both sides of the equation. - You can multiply or divide both sides by the same nonzero value. 5. Intermediate step showing division: $$d = \frac{\cancel{a}d}{\cancel{a}} = \frac{c - b}{a}$$ 6. Without specific values, this is the general solution for $d$. 7. If you provide the full equation, I can solve for $d$ explicitly.