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Given four points A(2, 1, 0)m B(1, 2, 3)...

Given four points `A(2, 1, 0)m B(1, 2, 3), C(3, 1, 1) and D(0, 1, 3)`. Point D lies on the line L which is perependicular to the plane determined by the points A, B, C. If the point of intersection of the plane determined by the points A, B, C and the line L is (a, b, c), then `9(a+b+c)` is equal to

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