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Pertanyaan

1. 4x+3y=10
2x+3y=15

2. 2x+4y=10
3x+7y=12

3. 3x + 2y=4
2x + 4y=10

1 Jawaban

  • 1 4x + 3y = 10 |×2| 8x + 6y = 20
    2x + 3y = 15 |×4| 8x + 12y = 10
    ------------------- -
    x - 6y = 10
    -6y = 10
    y = 10/-6
    4x + 3y = 10
    4x + 3(10/-6) = 10
    4x - 5 = 10
    4x = 10 + 5
    4x = 15
    x = 15/4

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