# Chapter R - Section R.4 - Properties of Real Numbers - R.4 Exercises: 8

like

#### Work Step by Step

When simplifying an expression, only like terms can be combined. For example, we can simplify $2a+7a=(2+7)a=(9)a$, because both terms share the same variable and are raised to the same power. For an expression with non-like terms like $4a+7b$, we cannot simplify any further.

After 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.