Question

No way do I get this problem....


If you were to use the substitution method to solve the following system, choose the new system of equations that would result if x was isolated in the second equation.3x + y + 2z = 1x + 2y - z = -83x - y - 3z = 18 (1 points)
Answer

7y - z = 255y - 6z = 42

-5x - 5z = -106x - z = 19

7x + 3z = -100x - 5z = 19

-5y + 5z = 25-7y = 42

Answer 1

From my paper I got B

Answer 2

I'm assuming I'm wrong

Answer 3

Go figure

Answer 4

if we isolate x in 2nd equation, the resulting equations shouldnt have x anymore

Answer 5

so the middle two options are gone

Answer 6

its either A or D

Answer 7

on cursory check, its D

Answer 8

seee if u get the same :D

Answer 9

holy sh** I am actually doing this right... I eliminated both the middle options

Answer 10

saw that it'd be -5, so that threw me to option D

Answer 11

;)

Answer 12

you're a good helper...seriously... wow thank you

Answer 13

same reasoning i used as urs.. good work !