Respuesta :

wolf1728
A) 4x − 2y − z = −5
B) x − 3y + 2z = 3
C) 3x + y − 2z = −5
Looking at ALL 4 solutions, x =0 in all of them.
So, let's say x = 0, eliminate the "x's" and just keep equations B and C

B) -3y + 2z = 3
C) y − 2z = −5
Add B) and C)
-2 y = -2
y = 1

1 − 2z = −5
-2z = -6

z = 3

and x = 0


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