SOLUTION: 3x+y-z=-1 2y-z=5 z=1

Algebra ->  Equations -> SOLUTION: 3x+y-z=-1 2y-z=5 z=1      Log On


   

Question 252580: 3x+y-z=-1
2y-z=5
z=1
Answer by drk(1908) About Me  (Show Source):
You can put this solution on YOUR website!
(i) 3x+y-z=-1
(ii) 2y-z=5
(iii) z=1
This is quite straight forward. Z = 1. Put z into (ii) to get
2y-1=5 - -> Y = 3.
Put y and z into (i) to get
3x+3-1 = -1 - - > 3x = -3 - -> x = -1.
So, {-1,3,1}