Question

find the solution to the system of equations down below
x+y+z=-1
x-y+z=-1
x+y-z=3

Answer 1

Answer:

x = 1

y = 0

z = - 2

Step-by-step explanation:

{x + y + z = - 1 $\rightarrow$ x = - 1 - y - z

{x - y + z = - 1

{x + y - z = 3

x - y + z = - 1

- 1 - y - z - y + z = - 1

- 2y = 0

y = 0

x = - 1 - y - z

x = - 1 - z

x + y - z = 3

- 1 - z - z = 3

- 1 - 2z = 3

- 2z = 4

z = - 2

x = - 1 - z

x = - 1 - (- 2)

x = 1

Another way to answer this question below.

I hope I helped you.