# Chapter R - Review of Basic Concepts - Chapter R Test Prep - Review Exercises: 51

$\color{blue}{-13}$

#### Work Step by Step

Substitute the given values of the variables to obtain: $=\dfrac{9(-1)+2(-2)}{-1+(-2)+4} \\=\dfrac{-9+(-4)}{-3+4} \\=\dfrac{-13}{1} \\=\color{blue}{-13}$

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