X+y-5z=24, y+z=1, z=-4

x=39, y = 5 and z = - 4.

Step-by-step explanation:

x + y - 5z = 24

y + z = 1

z = - 4

Plug z = - 4 into the second equation:

y + - 4 = 1

y = 5.

Now plug x = - 4 and y = 5 into the first equation:

x + 5 - 5*4 = 24

x = 24 - 5 + 20

x = 39.