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If a + b = 4 and a - b = 2 then, find the value of a = ____?
  1. 4
  2. 3
  3. 2
  4. None of these
Explanation

Given:

a + b = 4 ... (1)

a - b = 2 ... (2)

Add (1) and (2):

2a = 6

a = 3

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