Penyelesaian sistem persamaan 5x + 2y = -10 dan x – 3y = -19 adalah ….

Jawaban:

5x + 2y = -10……..×1

x – 3y = -19……….×5

——————————-

5x + 2y = -10

5x – 15y= -95

———————(-)

17y = 85

y = 5

5x + 2y = -10

5x + 2(5)=-10

5x = -10-10

5x = -20

x = -4

x ,y = -4 , 5

jawabnya= A. x = -4 dan y = 5

Jawaban dan cara :

5x + 2y = -10 ….(1)

x – 3y = -19 ….(2)

{ Eliminasi x }

5x + 2y = -10

5x – 15y = -95 (x5)

___________-

17y = 85

y = 5

Subtitusikan y = 5 ke persamaan (2)

x – 3y = -19

x -3(5) = -19

x -15 = -19

x = – 19 + 15

x = -4

Jawaban : A. x = –4 dan y = 5

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Semoga Membantu !!!