Lesson eLearning

An integer decreases by 6 to become twice the integer minus 10. Find the integer.

hard 3 marks Class 6 · Mathematics · Integers
Answer
4

The correct answer is 4 — Step 8: Conclude the integer is 4.

Step-by-step solution

  1. Step 1: Let the integer be .
  2. Step 2: Decrease by 6 gives .
  3. Step 3: Set this equal to twice the integer minus 10: .
  4. Step 4: Move to one side: .
  5. Step 5: Simplify left side: .
  6. Step 6: Add to both sides: .
  7. Step 7: Add 10 to both sides: .
  8. Step 8: Conclude the integer is 4.
Common mistake: Misplacing the negative sign while transposing terms.

Concept tested: Solving integer equations

Published · How this solution was prepared and checked

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