jawab plis plis sekarang sebelum jam 12 yang menjawab tak madain masuk surga
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Pertanyaan
jawab plis plis
sekarang sebelum jam 12
yang menjawab tak madain masuk surga
sekarang sebelum jam 12
yang menjawab tak madain masuk surga
1 Jawaban
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1. Jawaban fatimah3085
1) x - 2y = 1
x - y = 2
-----------------(-)
- y = - 1
y = 1
x - y = 2
x - 1 = 2
x = 2 + 1
x = 3
hp = {3,1}
2) x + 2y = 2 |×2
2x - y = 9
2x + 4y = 4
2x - y = 9
-----------------(-)
5y = - 5
y = - 1
x + 2y = 2
x + 2(-1) = 2
x - 2 = 2
x = 2 + 2
x = 4
hp = {4,-1}
3)y - 2x = - 1
y - x = 2
-------------------(-)
- x = - 3
x = 3
y - x = 2
y - 3 = 2
y = 2 + 3
y = 5
hp = {3,5}
4) 2x - y = 5
3x + y = 11
------------------(+)
5x = 16
x = 16/5
2x - y = 5
2(16/5) - y = 5
32/10 - y = 5
- y = 5 - 32/10
- y = 50/10 - 32/10
- y = 18/10
y = - 18/10
hp = {16/5 , - 18/10}
5)2x - 3y = 4 |×1
x + 2y = 9 |×2
2x - 3y = 4
2x + 4y = 18
------------------(-)
- 7y = - 14
y = 2
x + 2y = 9
x + 2(2) = 9
x + 4 = 9
x = 9 - 4
x = 5
hp = {5,2}