Basic Concepts
In a nutshell: Algebra lets you use symbols to solve puzzles and find unknowns in everyday situations.
## Introduction to Algebra
Algebra helps us find unknown values, like figuring out how many candies are in a jar if you know the total weight.
### Expressions vs. Equations
- **Expression**: A combination of numbers, variables, and operations (like \( 3x + 2 \))
- **Equation**: Two expressions set equal to each other (like \( 3x + 2 = 8 \))
### Simplifying Expressions
Combine like terms and use the order of operations (PEMDAS: Parentheses, Exponents, Multiplication/Division, Addition/Subtraction) to simplify.
### Solving Equations
The goal is to find the value of the variable that makes the equation true.
## Real-World Applications
Algebra is useful for budgeting, planning trips, and even coding video games!
Examples
- If \( x + 5 = 12 \), then \( x = 7 \).
- Simplifying \( 2x + 3x \) to \( 5x \).