Activity 1
2x + 7 = 19
Show step-by-step solution
2x = 12 → x = 6.
EDUCADORS / Learning guide
Secondary school · Algebra
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Original educational content
Learn the concept
Learning objective: Solve simple linear equations.
Preserve equality by performing the same operation on both sides.
Worked example
3x + 5 = 20 → 3x = 15 → x = 5
Practise and check
Activity 2
5x − 4 = 21
Show step-by-step solution
5x = 25 → x = 5.
Activity 3
4(x − 2) = 12
Show step-by-step solution
x − 2 = 3 → x = 5.
Learning tip: Preserve equality by performing the same operation on both sides.
Practice · Interactive labs
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Learning guide
Choose a course suitable for your level and learn at your own pace. Explore key ideas, practise with examples and check your results.
- Choose your level
- Step-by-step learning
- Suggested resources