Question

X + y + z = 4 jam
x + z = 6 jam
y + z = 8 jam
tentukan berapa jam masing2 x,y,z

Answer 1

X + y + z = 4
x + z = 6
y + z = 8

(Saya menggunakan cara matriks)

*) D =  = -2

*) Dx =  = -2 ~> Dx/D = jadi, x = 1 Jam

*) Dy =  = -6 ~> Dy/D = jadi, y = 2 Jam

*) Dz = x + y + z = 4
1 + 2 + z = 4
z = 1 Jam

Maka,
X = 1 JAm
Y = 2 Jam
Z = 1 Jam