Como resuelvo esta ecuación de 3x3

2x-4+z=-3y
Y-2z=14-x
-x-z=-2(y+25)
Gracias

2x-4+z=-3y ---> 2x + 3y + z = 4 **

Y-2z=14-x -----> x + y - 2z = 14 ***
-x-z=-2(y+25) ---> x - 2y + z = 50 ****

** - *** : x + 5y = -46 or x = -5y-46
2(**) + *** : 5x +7y = 22

sub x = -5y-46 into 5x +7y = 22
5(-5y-46) + 7y = 22
-25y - 230 + 7y = 22
-18y = 252
y = -14
then x = -5(-14) - 46 = 24

back in x - 2y + z = 50
24 + 28 + z = 50
z = -2

x = 24, y = -14, z = -2