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Many word problems become easy once you call the unknown x. Write each sentence of the story as maths, then solve by doing the same thing to both sides until x is alone.
✓ You passed this lesson’s test.
Let it be x — “call the unknown x, write the story as an equation, then do the same to both sides”
Use it for: Linear equations in Class 7–9, aptitude tests, and any puzzle with an unknown number.
Check: Pen ₹11: 2 × 11 + 3 × 6 = 22 + 18 = 40 ✓
▶ Watch it animatedWork it out in your head or on paper, type the answer and press Check. Stuck? Press “Show me how”.
Right: 0 · Tried: 0
20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.
🏅 Sign in with Google to earn the ✏️ Equation Explorer badge when you pass — and a certificate when you finish all 10 lessons of Part 3 · Aptitude challenge. You can still take the test without signing in.
Why does it work? When should you use it? Ask in English, मराठी or हिंदी.
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