SOLUTION: 4x-2y+Z=-7 Y+2z=1 Z=-1

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Question 1002461: 4x-2y+Z=-7
Y+2z=1
Z=-1
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
You substitute the third into the second equation, then into the first...
y+2(-1)=1
y-2=1
y = 3
Then
4x-2(3)+(-1) = -7
4x -6 -1 = -7
4x = 0
x = 0
(0,3,-1)