1. **State the problem:** Solve the equation $$30 - \frac{d}{3} = 18$$ for $d$. 2. **Isolate the term with $d$:** Subtract 30 from both sides to get $$30 - \frac{d}{3} - 30 = 18 - 30$$ which simplifies to $$- \frac{d}{3} = -12$$ 3. **Eliminate the negative sign:** Multiply both sides by $-1$ to get $$\frac{d}{3} = 12$$ 4. **Solve for $d$:** Multiply both sides by 3 to isolate $d$ $$d = 12 \times 3$$ $$d = 36$$ 5. **Final answer:** The solution to the equation is $$d = 36$$.