1. **State the problem:** Rewrite the equation $$\frac{3}{a} x - 4 = 20$$ to express $$x$$ in terms of $$a$$. 2. **Add 4 to both sides to isolate the term with $$x$$:** $$\frac{3}{a} x - 4 + 4 = 20 + 4$$ $$\Rightarrow \frac{3}{a} x = 24$$ 3. **Multiply both sides by $$a$$ to eliminate the denominator:** $$a \cdot \frac{3}{a} x = 24 \cdot a$$ Show the cancellation: $$\cancel{a} \cdot \frac{3}{\cancel{a}} x = 24a$$ $$\Rightarrow 3x = 24a$$ 4. **Divide both sides by 3 to solve for $$x$$:** $$\frac{3x}{3} = \frac{24a}{3}$$ Show the cancellation: $$\frac{\cancel{3}x}{\cancel{3}} = \frac{24a}{3}$$ $$\Rightarrow x = 8a$$ **Final answer:** $$x = 8a$$