Equations & Inequalities
Keep the balance: whatever you do to one side, do to the other.
Unknowns on both sidesEquations with bracketsInequalitiesSimultaneous equations
📖 Learn
Both sides
5x + 2 = 3x + 10 → take 3x from both sides → 2x + 2 = 10 → x = 4.
Inequalities
Solve like equations. 3x > 12 means x > 4. Multiply/divide by a negative? Flip the sign!
Simultaneous
Two equations, two unknowns. Add or subtract them to eliminate one letter.
Worked example
Solve 4x − 3 = x + 9
- 1Subtract x: 3x − 3 = 9
- 2Add 3: 3x = 12
- 3Divide by 3: x = 4 ✅
⭐ Practise
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