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maka y = -2x - 3
* 3y + 2x = -5
maka subsitusikan y :
3(-2x - 3) + 2x = -5
-6x - 9 + 2x = -5
-4x = 4
x = -1
subsitusikan x k salah satu persamaan :
2x + y + 5 = 2
2 . -1 + y +5 = 2
-2 + y + 5 = 2
y = -1