Solve the simultaneous equations and . Which pair is a solution?

Answer and explanation

Correct answer: B. ,

  1. Step 1: Substitute: , which gives .
  2. Step 2: Factorise: , so or .
  3. Step 3: When , . Check: .
Answer
, .
Why not the others: gives (it gives 5), fits the line but , and does not fit the line.

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