1. The problem asks to fill the box with a symbol to form: a) an equation b) an expression c) an inequality The given statement is $\frac{x}{5} - 8 \square 3x$ where $\square$ is the box to fill. 2. To form an equation, the symbol must be an equality sign $=$. So, $\frac{x}{5} - 8 = 3x$. 3. To form an expression, the symbol must be an operator like $+$ or $-$. So, $\frac{x}{5} - 8 + 3x$ or $\frac{x}{5} - 8 - 3x$ are expressions. 4. To form an inequality, the symbol must be one of $\leq$ or $>$. So, $\frac{x}{5} - 8 \leq 3x$ or $\frac{x}{5} - 8 > 3x$ are inequalities. 5. Summary: - Equation: $=$ - Expression: $+$ or $-$ - Inequality: $\leq$ or $>$ This completes the problem.