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If the equation of the plane that contains the point (–2, 3, 5) and is perpendicular to each of the planes 2x + 4y + 5z = 8 and 3x – 2y + 3z = 5 is  x +  y +  z + 97 = 0 then  +  +  =

1. 15
2. 18
3. 16
4. 17

Correct answer: 15

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