Answer
The number $9$ is added to each side of the inequality.
Work Step by Step
The given inequality is
$-1\geq b-9$
Add $9$ to each side.
$-1+9\geq b-9+9$
Simplify.
$8\geq b$
Hence, the number $9$ is added to each side of the inequality.
Big Ideas Math - Algebra 1, A Common Core Curriculum
by Larson, Ron; Boswell, Laurie
Published by
Big Ideas Learning LLC
ISBN 10:
978-1-60840-838-2
ISBN 13:
978-1-60840-838-2
Chapter 2 - Solving Linear Inequalities - 2.2 - Solving Inequalities Using Addition or Subtraction - Exercises - Page 65: 5
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