Sistem persamaan linear x+y= 3 2x-z= -1 x+z= 5 memiliki nilai Dy=...

x + z = 5 >>> z = 5 - x

subtitusikan z = 5 - x
2x - z = -1
2x - (5 - x) = -1
2x - 5 + x = -1
2x + x = -1 + 5
3x = 4
x = 4/3

z = 5 - x
z = 5 - 4/3
z = 15/3 - 4/3
z = 11/3

x + y = 3
y = 3 - x
y = 3 - 4/3
y = 9/3 - 4/3
y = 5/3

Jadi,
x = 4/3
y = 5/3
z = 11/3