Answer:
if x is what you are looking for then, x = 30
Step-by-step explanation:
3x - 40 = x + 20 (they are vertically oppositel
2x = 60
x = 30
The 2 given angles are vertical and congruent, thus
3x - 40 = x + 20 ( subtract x from both sides )
2x - 40 = 20 ( add 40 to both sides )
2x = 60 ( divide both sides by 2 )
