Answer:
x=14
Step-by-step explanation:
The angles are opposite each other, which means they are vertical angles. Therefore, the two angles are equal to each other. We can set them equal to each other.
43=3x+1
Solve for x,by getting x by itself. First, move all the numbers to one side. To do this, subtract 1 from both sides
43-1=3x+1-1
42=3x
x is still not by itself, it is being multiplied by 3. To undo this, divide both sides by 3
42/3-3x/3
14=x
