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<--> x+2y= -4
2y + 2y = -4
4y = -4
y=-4/4
y= -1
subtitusikan nilai y ke salah satu persamaan
x-2y= 0
x- 2(-1) = 0
x+2=0
x=-2
HP = (-2,-1)
x + 2y = -4
----------------- -
-4y = 4
y = 4/-4
= -1
x - 2y = 0
x - 2(-1) = 0
x + 2 = 0
x = 0 - 2
x = -2
Himpunan Penyelesaian = {-2,-1}