# Center

In the triangle ABC is point D[1,-2,6], which is the center of the |BC| and point G[8,1,-3], which is the center of gravity of the triangle.

Find the coordinates of the vertex A[x,y,z].

Correct result:

x =  22
y =  7
z =  -21

#### Solution:

${y}_{A}=7$
${z}_{A}=-21$

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