Chapter 8 - Coordinate Geometry and Linear Systems - 8.1 - Cartesian Coordinate System - Problem Set 8.1: 28

$x=-y-9$

Work Step by Step

Using the properties of equality, in terms of $x ,$ the given expression, $-x-y=9 ,$ is equivalent to \begin{array}{l}\require{cancel} -x=y+9 \\\\ x=-y-9 .\end{array}

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