Answer
-3 + 2x
Work Step by Step
"Sum" means addition, which is written with the + sign, and "twice a number" means 2 * x, which simplifies to 2x. Therefore, the expression " The sum of -3 and twice a number" is written as -3 + 2x.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.