Himpunan penyelesaian x+y=-5 dan x-2y=5

Jawab :

Eliminasi :

x + y = -5
x - 2y = 5
------------- -
    3y = -10
      y = -10/3

x + y = -5
x - 10/3 = -5
x = -5 + 10/3
   = (-15 + 10)/3
   = -5/3

HP = {-5/3 , 10/3}



Semoga membantu

x+y = -5
x-2y=5
------------ -
3y=-10
y=-10/3

subsi :
x-2(-10/3)=5
x=5-20/3
x=-5/3