1. The problem asks to translate the phrase "5 less than twice a number" into an algebraic expression. 2. "Twice a number" means $2n$ where $n$ is the number. 3. "5 less than twice a number" means you subtract 5 from $2n$, so the expression is $2n - 5$. 4. Among the options given: A. $5 + 2n$, B. $5 - 2n$, C. $2n + 5$, D. $2n - 5$, the correct one is D. $2n - 5$. Final answer: $2n - 5$