Chapter 1 - Introduction to Algebraic Expressions - 1.6 Subtraction of Real Numbers - 1.6 Exercise Set - Page 49: 108

$7a \text{ and } -9b$

Algebraic terms are numbers and variable/s that are separated by a plus or minus sign. Hence, the terms in the given expression, $ 7a-9b ,$ are \begin{array}{l}\require{cancel} 7a \text{ and } -9b .\end{array}