CPM Homework Help : INT3 Problem 4-121

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4-121.

Solve each equation or inequality.

$|x-1|=9$
Hint (a):
Rewrite the equation as: $x−1=9$ or $x−1=−9$
Solve and check both equations.

$2|x+1|+3=9$
Hint (b):
Get the absolute value expression by itself first. Then rewrite the equation using the hint in part (a).

$|x-1|<3$
Answer (c):
$−2<x<4$

$|x+5|\ge8$
Hint (d):
See part (c).

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