Selesaikan dengan metode eliminasi: 1. x + 2y = 3 x + 3y = 4 2. -2 x + 4y = -6 3x + 2y = 0
Matematika
Willowsofditzy
Pertanyaan
Selesaikan dengan metode eliminasi:
1. x + 2y = 3
x + 3y = 4
2. -2 x + 4y = -6
3x + 2y = 0
1. x + 2y = 3
x + 3y = 4
2. -2 x + 4y = -6
3x + 2y = 0
1 Jawaban
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1. Jawaban cupid85
1) x + 2y = 3
x + 3y = 4
------------------(-)
- y = - 1
y = 1
x + 2y = 3 |×3
x + 3y = 4 |×2
3x + 6y = 9
2x + 6y = 8
------------------(-)
x = 1
hp = {1 , 1}
2) - 2x + 4y = - 6
3x + 2y = 0 |×2
- 2x + 4y = - 6
6x + 4y = 0
---------------------(-)
- 8x = - 6
x = 6/8
x = ⅔
- 2x + 4y = - 6 |×3
3x + 2y = 0 |×2
- 6x + 12y = - 18
6x + 4y = 0
------------------------(+)
16y = - 18
y = - 18/16
y = - 9/8
hp = {⅔ , - 9/8}