Himpunan penyelesaian dari 1/3x + 1/4y=4 dan 1/2x + 3/2y =15 ?

Kelas 8 Matematika
Bab SPLDV

(1/3) x + (1/4) y = 4 → dikali 36 → 12x + 9y = 144
(1/2) x + (3/2) y = 15 → dikali 6 → 3x + 9y = 90

12x + 9y = 144
  3x + 9y =   90
---------------------- -
9x = 54
x = 6

3x + 9y = 90
3 . 6 + 9y = 90
9y = 90 - 18
y = 72/9
y = 8

HP = { (6, 8) }