Matematika

Pertanyaan

TOLONG JAWAB YA PLEASE !!!
1. 8X - 15 = 3X + 7
2. 7X + 3 = 5X + 9
3. -4X + 7 = 3X - 8

1 Jawaban

  • 8x - 15 = 3x + 7
    8x - 3x = 7 + 15
    5x = 22
    x = 22/5

    7x + 3 = 5x + 9
    7x - 5x = 9 - 3
    2x = 6
    x = 3

    -4x + 7 = 3x - 8
    -4x - 3x = -8 - 7
    -7x = -15
    x = 15/7

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