SOLUTION: What is the solution to the system of equations below? X + 2Y - Z = -3 2X - Y + 3Z = 14 X + 4Y - 2Z = -8 A. (1,1,6) B. (1,3,5) C. (4,-1,4) D. (2,-1,3)

Question 84468This question is from textbook finite mathmatics
: What is the solution to the system of equations below?
X + 2Y - Z = -3
2X - Y + 3Z = 14
X + 4Y - 2Z = -8

A. (1,1,6)
B. (1,3,5)
C. (4,-1,4)
D. (2,-1,3) This question is from textbook finite mathmatics

Answer by Flake(45) (Show Source): You can put this solution on YOUR website!
You need to get to a equation with only one unknow.
---Step#1: Start with (X + 4Y - 2Z = -8) - (X + 2Y - Z = -3).
becomes 2Y - Z = -5
becomes Z = 2Y+5
Now you need the X to equal in term of Y
Then substitude X and Z to one of the equations to solve Y.

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