SOLUTION: Solve the system using substitution or elimination. The answers are given as (x, y, z). 5x+3y+2z=-4 -5x-4y-2z=7 4x+2y+2z=-2

Algebra ->  Matrices-and-determiminant -> SOLUTION: Solve the system using substitution or elimination. The answers are given as (x, y, z). 5x+3y+2z=-4 -5x-4y-2z=7 4x+2y+2z=-2       Log On


   

Question 788449: Solve the system using substitution or elimination. The answers are given as (x, y, z).
5x+3y+2z=-4
-5x-4y-2z=7
4x+2y+2z=-2
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
5x+3y+2z=-4
-5x-4y-2z=7
4x+2y+2z=-2
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Add eqn 1 & 2
Sub for the value of y in 2 of the 3 eqns --> 2 eqns in x & z.
Can you do the rest?