dengan metode substitusi tentukan hp dari 2x-3y=11 dan 3x+y=0

2x - 3y = 11 .....................(1)
3x + y = 0 ........................(2)

dari pers. (2)
3x + y = 0
9x + 3y = 0
3y = -9x 
subtitusikan 3y = -9x ke pers. (1)
2x - 3y = 11
2x - (-9x) = 11
11x = 11
x = 1

subtitusikan x = 1 ke pers(2)
3(1) + y = 0
y = -3


jadi HP = {(1,-3)}

2x - 3y = 11
9x + 3y = 0
___________ +
11 x = 11
x = 1

2x - 3y = 11
2 - 3y = 11
- 3y = 11 - 2
- 3y = 9
- y = 3
y = -3