Tentang program linear X-y=5 2x+y=8 Caranya gimana Tolong dijawab pliss bsok

Materi : Program Linear
Bahasan : Persamaan Linear 2 Variabel
Jawaban : HP = {13/3, - 2/3}

Langkah - langkah :
  x - y = 5
2x + y = 8
------------------ +
x + 2x = 5 + 8
3x = 13
x = 13/3

Substitusi x
13/3 - y = 5
- y = 5 - 13/3
- y = 2/3
y = - 2/3

x-y=5
2x+y=8
______________+
3x+0 =13
x= 13/3

x-y=5
13/3 - y = 5
y= 13/3 -5
y = 13/3 -15/3
y= -2/3