# Chapter 1 - Foundations for Algebra - 1-9 Patterns, Equations, and Graphs - Practice and Problem-Solving Exercises: 9

No

#### Work Step by Step

$y=1-x$ Substitute values for x and y to determine whether the resulting expression is true. $1\overset?=1-2$ $1\ne-1$ Thus, the ordered pair is not a solution to the equation.

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