NYED9306GO NYED9306GO Mathematics Answered Resolva e clasdifique os sistemas escalonados a) -3x+5y=-11 2y=-2 b) x+y-z=2 -2y+z=3 -4z=4 c)3x-y+z=3 y-z=0 d) x+2y-z=-2 y+3z=1