Answer
The least common denominator
Work Step by Step
The least common denominator is the least common multiple of the two denominators. $3x$ is the least common multiple of $3$ and $x$, so it is the least common denominator.
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.