Key Concepts
- Variables represent unknown values:
x, y. - Equation balances two expressions:
2x+3=13. - Solve by isolating the variable:
2x=10 ⇒ x=5.
Illustration
Placeholder: balance-scale metaphor for equations.
Practice
- Solve:
x + 7 = 19 - Solve:
3x - 6 = 0