Sistem persamaan dua variabel X+y =-3 x-y = -1

Bab Persamaan Linear
Matematika SMP Kelas VII

x + y = - 3
x - y = - 1
---------------- + 
2x = -4
x = - 2

x + y = -3
-2 + y = -3
y = - 3 + 2
y = - 1

HP = {(-2. -1)}