1. **State the problem:** Simplify the expression $(2k-3)x^3$. 2. **Understand the expression:** This is a product of a binomial $(2k-3)$ and a monomial $x^3$. 3. **Apply the distributive property:** Multiply each term inside the parentheses by $x^3$: $$ (2k-3)x^3 = 2kx^3 - 3x^3 $$ 4. **Final simplified expression:** The expression is already simplified as $2kx^3 - 3x^3$. This is the expanded form showing each term multiplied by $x^3$.