Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 3 - Solving Inequalities - 3-2 Solving Inequalities Using Addition or Subtraction - Practice and Problem-Solving Exercises - Page 174: 22



Work Step by Step

$z-12 \leq -4$ : add 12 to both sides $z-12+12\leq -4+12$ : simplify $z\leq 8$ Verify that 8 is a solution at the endpoint. $8-12\overset?= -4$ $-4=-4\checkmark$ Verify that a number less than 8 is a solution. $6-12\overset?\leq -4$ $-6\leq -4\checkmark$
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