Pers 1 2x+y = -1
Pers 2 3y-2x= 5
jadi pers 3 diambil dari pers 1 : y = -2x -1
Disub ke pers 2
3y- 2x = 5
3 ( -2x - 1)-2x = 5
-6x - 3 - 2x = 5
-6x -2x = 5 + 3
-8x = 8
x = 8/-8 = -1
disub ke pers 1
2x+y = -1
2(-1)+y = -1
-2+y = -1
y = 2-1
y = 1
{ x,y } = { -1,1 }