What is the value of x - y - z?
x + y + z = 24
x + y - z = 12
x - y + z = 16
From second equation we getOriginally Posted by Natasha1
In third equation we replace z
So we get now
From second equation we get y=z-2
We replace y in first equation
So we have x=14 and z=6 so we get that y=4.