SOLUTION: Solve the system of equations using matrices. Use Gaussian elimination with back-substitution. x + y + z = -5 x

SOLUTION: Solve the system of equations using matrices. Use Gaussian elimination with back-substitution. x + y + z = -5 x - y + 3z = -1 4x + y + z = -2 Pls pro

Question 1075270: Solve the system of equations using matrices. Use Gaussian elimination with back-substitution.
x + y + z = -5
x - y + 3z = -1
4x + y + z = -2
Pls provide step by step answer
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Add R1 and R2,

R4:
Add R2 and R3,

R5:
Multiply R4 by -5 and add to R5,

So then working backwards,

and

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