Answer
f=8 or f=2
Work Step by Step
4|f−5|=12⟶ divide each side by 4
4|f−5|÷4=12÷4⟶ divide
|f−5|=3⟶ definition of absolute value
f−5=3 OR f−5=−3⟶ add 5 to all parts
f−5+5=3+5 OR f−5+5=−3+5⟶ add
f=8 OR f=2
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 3 - Solving Inequalities - 3-8 Unions and Intersections of Sets - Practice and Problem-Solving Exercises - Page 220: 51
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