Answer:
x = 8
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Equality Properties
Geometry
- All angles in a triangle add up to 180°
Explanation:
Step 1: Set up Equation
(7x - 1) + 80 + (6x - 3) = 180
Step 2: Solve for x
- Combine like terms: 13x + 76 = 180
- Isolate x term: 13x = 104
- Isolate x: x = 8