SOLUTION: Solve the system by the method of substitution x+y+3z=-4 -x-y-2z=5 2x-z=-3

Algebra ->  Expressions-with-variables -> SOLUTION: Solve the system by the method of substitution x+y+3z=-4 -x-y-2z=5 2x-z=-3      Log On


   

Question 636520: Solve the system by the method of substitution
x+y+3z=-4
-x-y-2z=5
2x-z=-3
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

 x+y+3z= -4                0r y+=+-x-3z-4+ 

-x-y-2z= 5     

      z = 1

 2x-z=-3

 2x-1 = -3

     2x = -2

      x = -1  and y = -6       +y+=+1+-3+-4+=+-6



and...

 +-+1+-+6+%2B+3+=+-4