100 Facts Weather- Hurricanes, Tornadoes, Blizzards, Educational Projects, Fun Activities, Quizz

100 Facts Weather- Hurricanes, Tornadoes, Blizzards, Educational Projects, Fun Activities, Quizz

himpunan penyelesaian dari sistem persamaan linear : 2x - y = 5 dan x + 3y = -1 adalah​

himpunan penyelesaian dari sistem persamaan linear : 2x - y = 5 dan x + 3y = -1 adalah​

Jawaban:

Himpunan = {(2,-1)}

Penjelasan:

2x - y = 5

x + 3y = -1

Eliminasi persamaan satu dan dua

2x - y = 5 | ×1 | 2x - y = 5

x + 3y = -1 | ×2 | 2x + 6y = -2

2x - y = 5

2x + 6y = -2

_________ -

-7y = 7

y = -1

Lalu, subtitusikan hasil y kedalam salah satu persamaan linear

2x - y = 5

2x - ( -1 ) = 5

2x + 1 = 5

2x = 5 - 1

2x = 4

x = 4/2

x = 2

Maka, Himpunan Penyelesaian = {(x,y)} = {(2,-1)}