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Algebra Basics
· Formula🧮 Formula Reference Sheet
Variable: a letter representing an unknown 2x + 3 = 11 → 2x = 8 → x = 4 Like terms: 3x + 5x = 8x; 3x + 4y can't combine Distributive: a(b+c) = ab + ac Quadratic: ax² + bx + c = 0
⚡ Example per formula
Variable: a letter representing an unknown
↳x represents an unknown number
2x + 3 = 11 → 2x = 8 → x = 4
↳2x = 8 → x = 4
Like terms: 3x + 5x = 8x; 3x + 4y can't combine
↳3x + 5x = 8x
Distributive: a(b+c) = ab + ac
↳2(x + 3) = 2x + 6
Quadratic: ax² + bx + c = 0
↳x² − 5x + 6 = 0 → x = 2, 3
✏️ Worked Example
Solve: 4x − 7 = 17
👁 Show step-by-step solution
4x = 24 → x = 6. ✅ Answer: x = 6
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