Answer
$x=15^o$.
Work Step by Step
We know that $\angle 1$ and $\angle4$ are supplementary, so
$$\angle 1+\angle 4=180 \Longrightarrow 4x+55+10x-85=180 \Longrightarrow 14x=210$$
and hence $x=15^o$.
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 12 - Section 12.1 - Angles and Polygons - Exercise - Page 388: 23
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.
