nilai x dari sistem persamaan 5x-3y=9 dan -2x-5y=-16
Matematika
syifa1550
Pertanyaan
nilai x dari sistem persamaan 5x-3y=9 dan -2x-5y=-16
2 Jawaban
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1. Jawaban Anonyme
Kelas 8 Matematika
Bab SPLDV
5x - 3y = 9 → dikali 2 → 10x - 6y = 18
-2x - 5y = -16 → dikali 5 → -10x - 25y = -80
10x - 6y = 18
-10x - 25y = -80
------------------------ +
-31y = -62
y = 2
5x - 3y = 9
5x - 3 . 2 = 9
5x = 9 + 6
x = 15/5
x = 3 -
2. Jawaban safiraaiueo
Jawab :
10x + 6y = 18
-10x - 25y = -80
______________ +
-31y = -62
y = 2
substitusi ke 1
5x - 3y = 9
5x - 3(2) = 9
5x - 6 = 9
5x = 9 + 6
5x = 15
x = 15/5
x = 3