Find the value of y showing your steps or explaining your thinking. (2 pts.)

Answer:
y = 54
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Algebra I
Geometry
Step-by-step explanation:
Step 1: Define
3(x + 7)° = 63°
3(x + 7)° + 63° + y° = 180°
Step 2: Solve for x
Step 3: Solve for y