Question

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
A. {( 1, -4, -2)}
B. {( -2, 1, -4)}
C. {( 1, -2, -4)}
D. {( -2, -4, 1)}

Answer 1

@AnswerMyQuestions

Answer 2

A

Answer 3

Yeah, A is the answer.

Answer 4

I just checked, and 1, -4, -2 all satisfy it.

Answer 5

Thanks guys! :)

Answer 6

all satisfy them*