Question

2x – y + z = –1

x – y + z = 1

x – 2y + z = 2



x=? y=? z=?

Answer 1

2x – y + z = –1
x – y + z = 1 subtract
x = -2
so we have
-2 - y + z = 1
-2 -2y + z = 2 subtract
y = -1

from first equation
-4 -(-1) + z = -1
can you finish this off

Answer 2

Yes, I got it, thank you