Question 633376
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Hi,
Solve the following system of equations. 
2x + 4y – 3z = –7
 3x + y + 4z = –12
 x + 3y + 4z = 4 
D = -72, Dx = 432,  Dy = -144,  Dz = -72
  x = -6,  y = 2, z = 1