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Solve the system of equations. If the system has a unique solution, give it as an ordered triple: `(x,y,z)`
` { ( x-2y+z = -8), ( y+2z = 6), ( x+y+3z = 6) :} `
Get help:
Box 1: Enter your answer as a point. Example: (2,5.5172)
`(-1,4,1)`