tentukan HP nya [tex]4x - 2y = 16 \\ x - 3y = 9 [/tex]

Bab Persamaan Linear
Matematika SMP Kelas VIII

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

4x - 2y = 16
4(3y + 9) - 2y = 16
12y + 36 - 2y = 16
10y = 16 - 36
y = -20/10
y = -2

x = 3y + 9
   = 3 . (-2) + 9
  = -6 + 9
  = 3

HP = { (3, -2) }