SOLUTION: solve the system: x+y-z=2 2x+y+z=3 3x+y+z=5

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Question 393975: solve the system:
x+y-z=2
2x+y+z=3
3x+y+z=5
Answer by pie90010(44) About Me  (Show Source):
You can put this solution on YOUR website!
USE MATRICES LOL
[1 1 -1] [x] [2]
[2 1 1] [y]=[3]
[3 1 1] [z] [5]
let the first matrix be A , and the last one with the salutions be B
now just find the inverse of A, and multiple it by B (easiest done with a calculator)
and you'll get
x = 2
y = -.5
z = -.5