Find answers to your questions faster and easier with IDNLearn.com. Ask any question and receive timely, accurate responses from our dedicated community of experts.
Answer:
9
Step-by-step explanation:
Vertical lines are parallel so the given interior angles are supplementary and their sum is equal to 180:
4x + 9 + 16x - 9 = 180 add like terms
20x = 180 divide both sides by 20
x = 9