Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 1 - Review - Exercises - Page 134: 69


$x=11$ and $x=3$

Work Step by Step

$|x-7|=4$ By the definition of absolute value, solving this equation is equivalent to solving two separate equations, which are: $x-7=4$ and $x-7=-4$ Solve both equations for $x$: $x-7=4$ $x=4+7$ $x=11$ $x-7=-4$ $x=-4+7$ $x=3$
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