Answer:

Step-by-step explanation:
We know that,
The sum of interior angles of a triangle is 180 degrees.
So,
2x + 4 + 2x - 9 + x = 180
5x - 5 = 180
Add 5 to both sides
5x = 180 + 5
5x = 185
Divide both sides by 5
x = 185 / 5
x = 37
![\rule[225]{225}{2}](https://tex.z-dn.net/?f=%5Crule%5B225%5D%7B225%7D%7B2%7D)
Hope this helped!
<h3>~AH1807</h3>
The measure of ∠4, ∠3 and ∠7 are 115°, 65° and 65° respectively.
<h3>
Equation</h3>
An equation is an expression used to show the relationship between two or more numbers and variables.
From the diagram:
∠2 + ∠4 = 180° (sum of angles in a straight line)
∠4 + 65 = 180
∠4 = 115°
b) ∠2 = ∠3 (vertically opposite angles)
∠3 = 65°
c) ∠3 = ∠7 (corresponding angles)
∠7 = 65°
The measure of ∠4, ∠3 and ∠7 are 115°, 65° and 65° respectively.
Find out more on Equation at: brainly.com/question/18831322
Answer:
-20/21
Step-by-step explanation: