garis 2x-3y=-12 dan garis x+y=9 berpotongan dititik... a.(3,2) b.(2,7) c.(-3,2) d.(-3,6) e.(3,6)

Kelas 8 Matematika
Bab SPLDV

x + y = 9 → dikali 2 → 2x + 2y = 18

2x + 2y = 18
2x - 3y = -12
------------------ -
5y = 30
y = 30/5
y = 6

x + y = 9
x + 6 = 9
x = 9 - 6
x = 3

Titik potong (3, 6)

✩✩ E ✩✩