# Chapter 1 - Introduction to Algebraic Expressions - 1.1 Introduction to Algebra - 1.1 Exercise Set: 24

6

#### Work Step by Step

We are asked to evaluate the given equation for $m=20$ and $n=8$. We can plug in directly to evaluate. $\frac{m-n}{2}=\frac{(20)-(8)}{2}=\frac{12}{2}=\frac{12\div2}{2\div2}=\frac{6}{1}=6$

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