Answer:
27
Step-by-step explanation:
They are vertical angles, and vertical angles are always equal, so set them equal to each other
2x + 1 = 55
Subtract one
2x = 54
Divide by 2
x = 27
Its a vertical pair or angles so they equal each other.
55 = (2x + 1)
Get rid of parentheses.
55 = 2x + 1
Subtract 1 on both sides.
54 = 2x
Divide 2 on both sides.
