X + 2y = -3 ... (1) Y + 2x = 4 ... (2) X + y + 2z = -5 ... (3) Cari eliminasi

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

x+2y=-3
4x+2y=8 kurangkan

hasil - 3x=-11
x=11/3
11/3+2y=-3
2y=-9/3 - 11/3
= - 20/3
y= - 10/3

11/3-10/3+2z=-5
1/3+2z=-5
2z=-15/3-1/3
= - 16/3
z= - 8/3