X+y=-5 dan x-4y=5 (campuran)

Bab Persamaan Linear
Matematika SMP Kelas VIII

x + y = -5
x - 4y = 5
--------------- -
5y = -10
y = -10/5
y = -2

x + y = -5
x + (-2) = -5
x = -5 + 2
x = -3

HP = { (-3, -2) }