2x+y=1 dan 2x-y=2 metode substitusi

Materi : SPLDV

2x + y = 1
y = 1 - 2x

2x - y = 2
2x - (1 - 2x) = 2
2x - 1 + 2x = 2
4x = 3
x = 3/4

2x - y = 2
2(3/4) - y = 2
6/4 - y = 2
3/2 - y = 2
-y = 2 - 3/2
-y = 4/2 - 3/2
-y = 1/2
y = -1/2

Hp = { 3/4 , -1/2 }