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The sum of coord inates of a point insid...

The sum of coord inates of a point inside the triangle which is situated at equal distance from all the three sides of the triangle if mid points of sides are `(a, 1 + b), (a, c) and (b, c)` where `a, b, c` satisfies `4a^2 + b^2 + c^2 + 21=12a-2b + 12c-25` is equal to :

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