Himpunan penjelas dari 5x + 2y = 9 4x + y = 12 Dengan menggunakan metode subtitusi

4x + y = 12
y = - 4x + 12

5x + 2y = 9
5x + 2(-4x + 12) = 9
5x - 8x + 24 = 9
- 3x = 9 - 24
x = - 15 ÷ - 3 = 5

y = - 4(5) + 12 = - 20 + 12 = (-8)

SPLDV

5x + 2y = 9...×1
4x + y = 12....×2

5x + 2y = 9
8x + 2y = 24
------------------- (-)
-3x = -15
3x = 15
x = 15/3
x = 5


4x + y = 12
4(5) + y = 12
y = 12 - 20
y = -8

Jadi, HP { 5 , -8}

x = 5
y = -8

Semoga membantu ;)