Solve the system of equations

Question

 

6x+y+6z=6

7x-y+5z=7

x-2y-z=0

 

 

Section 3.3. 5

Answer 1

Adding 1st & 2nd equation,

 

  13X + 11z = 13   (1)

 

 Subtract 2 times 2nd equation from the 3rd.

 

-2 (7X - y + 5Z = 7)

     X  - 2Y - Z = 0

    -13X - 11Z = -14   ( 2)

 

   System of equation of (1) & (2) doesn't have any answer.