1. The problem is to solve the equation $20 = 8$ for $x$. However, this equation as stated is not valid since $20$ does not equal $8$. It seems you want to solve one of the listed equations involving $x$. 2. Let's pick the first equation involving $x$ from your list: $\frac{1}{8}x = 1000$ (labeled R). 3. The formula to solve for $x$ when given $\frac{1}{8}x = 1000$ is to multiply both sides by 8 to isolate $x$: $$x = 1000 \times 8$$ 4. Multiplying both sides by 8: $$\cancel{8} \times \frac{1}{\cancel{8}} x = 1000 \times 8$$ 5. Simplifying the left side: $$x = 8000$$ 6. Therefore, the solution to $\frac{1}{8}x = 1000$ is $x = 8000$. This is the first distinct problem solved from your list.