Answer:
x = 35
General Formulas and Concepts:
Pre-Algebra
- Order of Operations: BPEMDAS
- Equality Properties
Geometry
- Definition of a Line: A line is 180°
Step-by-step explanation:
Step 1: Set up equation
40° + (2x + 30)° + 40° = 180°
Step 2: Solve for x
- Combine like terms: 2x + 110 = 180
- Subtract 110 on both sides: 2x = 70
- Divide 2 on both sides: x = 35
