Nilai x,y dan z dari sistem persamaan berikut... x + 2y - z = 2 -x + y + 3z = 10 -4x + 3y + z = 5 Adalah..
Matematika
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Pertanyaan
Nilai x,y dan z dari sistem persamaan berikut...
x + 2y - z = 2
-x + y + 3z = 10
-4x + 3y + z = 5
Adalah..
x + 2y - z = 2
-x + y + 3z = 10
-4x + 3y + z = 5
Adalah..
1 Jawaban
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1. Jawaban Arkan5283
x + 2y - z = 2
- x + y + 3z = 10
- 4x + 3y + z = 5
x + 2y - z = 2
- z = 2 - x - 2y
z = x + 2y - 2
- x + y + 3z = 10
- x + y + 3(x + 2y - 2) = 10
- x + y + 3x + 6y - 6 = 10
2x + 7y = 10 + 6
2x + 7y = 16
- 4x + 3y + z = 5
- 4x + 3y + x + 2y - 2 = 5
- 3x + 5y = 5 + 2
- 3x + 5y = 7
2x + 7y = 16|× 5
- 3x + 5y = 7|× 7
10x + 35y = 80
- 21x + 35y = 49
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31x = 31
x = 1
2x + 7y = 16
2 + 7y = 16
7y = 16 - 2
7y = 14
y = 2
z = x + 2y - 2
z = 1 + 4 - 2
z = 3
x = 1
y = 2
z = 3
Maaf Kalau Salah