Cassandra S.

asked • 05/22/18# Step by Step equation on Matrix

3x -y - z = 4

x + y + 2z = 1

4x - y + z = 0

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## 2 Answers By Expert Tutors

Billy M. answered • 06/01/18

Tutor

4.6
(5)
Need a math tutor? I am a local Albany State Univ. math tutor

using your TI83 calculator, rewrite this 3x4 linear system as a 4x4 matrix

(3,-1,-1,4),(1,1,2,1),(4,-1,1,0),(0,0,0,0)

next press 2nd-matrix ,edit and enter the above augmented matrix

press 2nd-quit to save

next 2nd-matrix-math-rref to obtain the below reduced row matrix

(1,0,0,2),(0,1,0,5),(0,0,1,-3),(0,0,0,0)

thus: x=2, y=5 and z=-3

Billy M. answered • 06/01/18

Tutor

4.6
(5)
Need a math tutor? I am a local Albany State Univ. math tutor

using your TI83 calculator, rewrite this 3x4 linear system as a 4x4 matrix

(3,-1,-1,4),(1,1,2,1),(4,-1,1,0),(0,0,0,0)

next press 2nd-matrix ,edit and enter the above augmented matrix

press 2nd-quit to save

next 2nd-matrix-math-rref to obtain the below reduced row matrix

(1,0,0,2),(0,1,0,5),(0,0,1,-3),(0,0,0,0)

thus: x=2, y=5 and z=-3

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Paul M.

05/22/18