Question

SPLinear tiga variabel

x-y + 2z sama dengan -5
2x +y +z sama dengan -1
X+y-z sama dengan 3
HP???????????

Tolong dibantu donk gak ngerti sama sekali tolong dijawab sama caranya ya plissss kaka plissss kaka tolong ya

Answer 1

X-y+2z = -5
2x+y+z = -1 +
    3x + 3z = -6

2x+y+z = -1
x + y - z = 3   
   x + 2z = -4

3x + 3z = -6
3x + 6z = -12     
-3z = 6
z = -2

x + 2z = -4
x - 4 = -4
x = 0

x+y-z = 3
0 + y - (-2) = 3
y = 1

x = 0, y = 1, z = -2