4x+3y=12 dan 8x-5y=12

Bab SPLDV
Matematika SMP Kelas VIII

4x + 3y = 12 → dikali 2 → 8x + 6y = 24

8x + 6y = 24
8x - 5y = 12
------------------- -
11y = 12
y = 12/11

4x + 3y = 12
4x + 3 . 12/11 = 12
4x + 36/11 = 12
4x = 12 - 36/11
4x = 132/11 - 36/11
x = 96/11 : 4
x = 24/11

(24/11, 12/11)