SOLUTION: 5x+3y+2z=-4 -5x-4y-2z=7 4x+2y+2z=-2 Solve with substitution or elimination

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: 5x+3y+2z=-4 -5x-4y-2z=7 4x+2y+2z=-2 Solve with substitution or elimination      Log On


   

Question 668059: 5x+3y+2z=-4
-5x-4y-2z=7
4x+2y+2z=-2
Solve with substitution or elimination
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 the middle eqn to the others to eliminate the z terms.
Then you have a system in x & y.
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I don't need the practice, but I'll check your work.