# Chapter 9 - Basic Algebra - Review Exercises: 102

$\frac{x}{2}$

#### Work Step by Step

The phrase 'half a number $x$' means the product of $\frac{1}{2}$ and x. Therefore, we are multiplying $\frac{1}{2}$ and x together. In symbols, this is $\frac{1}{2}(x)=\frac{x}{2}$.

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