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UPCAT Mathematics practice question 17: Solve the system: 2x + y = 11 and x − y = 1

Correct answer

C. x = 4, y = 3

Adding the equations eliminates y: 3x = 12, so x = 4. Substituting gives y = 3.

Solve the system: 2x + y = 11 and x − y = 1

  1. x = 3, y = 5
  2. x = 5, y = 1
  3. x = 4, y = 3Correct
  4. x = 2, y = 7

Why C is correct

Adding the equations eliminates y: 3x = 12, so x = 4. Substituting gives y = 3.

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