SOLUTION: Use matrices to solve the system of equations (if possible). Use Gaussian elimination with back-substitution or Gauss-Jordan elimination. (If there is no solution, enter NO SOLUTI

SOLUTION: Use matrices to solve the system of equations (if possible). Use Gaussian elimination with back-substitution or Gauss-Jordan elimination. (If there is no solution, enter NO SOLUTI

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Question 631491: Use matrices to solve the system of equations (if possible). Use Gaussian elimination with back-substitution or Gauss-Jordan elimination. (If there is no solution, enter NO SOLUTION. If the system is dependent, set z = a and solve for x and y in terms of a.)
3x − 2y + z = 7
−x + y + 2z = −12
x − y − 4z = 20

(x,y,z)=
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
x = 3, y = -1, z = -4
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