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Find X If X + Y = 5, and X - Y = 7 - Algebra

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Question

Find x if x + y = 5, and x - y = 7

Solution

(4)
      x + y = 5
      x - y = 7
        2x = 12
         x = 6

  Is there an error in this question or solution?
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Find X If X + Y = 5, and X - Y = 7 Concept: Arithmetic Progression Examples and Solutions.
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