SOLUTION: solve each system by elimination. check your answers. -x-y-2z=4 -x+2y+z=1 -x+y-3z=11

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: solve each system by elimination. check your answers. -x-y-2z=4 -x+2y+z=1 -x+y-3z=11      Log On


   

Question 106977This question is from textbook texas algebra II
: solve each system by elimination. check your answers.

-x-y-2z=4
-x+2y+z=1
-x+y-3z=11 This question is from textbook texas algebra II

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
adding first with third gives -2x-5z=15

adding 2 times first with second gives -3x-3z=9 ... -2x-2z=6

(-2x-5z=15)-(-2x-2z=6)=(-3z=9)