Prealgebra (7th Edition)

Published by Pearson
ISBN 10: 0321955048
ISBN 13: 978-0-32195-504-3

Chapter 9 - Review - Page 686: 10


$\angle x=25^{\circ}$

Work Step by Step

We can see, that the sum of the two angles ($20^{\circ}$ and $\angle x$) is $45^{\circ}$. We can write the following equation: $20^{\circ}+\angle x=45^{\circ}$ $\angle x=45^{\circ}-20^{\circ}$ $\angle x=25^{\circ}$
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