x+2y=16 6x-y=18 pakai cara substitusi!

x + 2y = 16
x = - 2y + 16

6x - y = 18
6(-2y + 16) - y = 18
- 12y + 96 - y = 18
- 13y = 18 - 96
- 13y = - 78
y = 6

x = - 2y + 16
x = - 2(6) + 16
x = - 12 + 16
x = 4

hp = {4,6}

6x - y = 18
12x - 2y = 36
2y = 12x - 36
subtitusikan 2y ke x + 2y = 16
x + 2y = 16
x + 12x - 36 = 16
13x = 52
x = 52/13
x = 4

subtitusikan x = 4 ke 6x - y = 18
6x - y = 18
6(4) - y = 18
y = 24 - 18
y = 6

jadi HP : {4,6}