Matematika

Pertanyaan

Nilai x yang memenuhi persamaan 5|×-7|+2=7 adalah?? Tolong bantu jawab pakek cara

2 Jawaban

  • 5(x-7) +2 =7  atau 5(-x+7) + 2 = 7
    5x-35=5                  -5x +35 = 5
    5x = 40                        -5x = -30
    x = 8                              x = 6
  • 5|×-7|+2=7, utk x > 7
    5x - 35 + 2 = 7
    5x -33 = 7
    5x = 7 + 33
    5x = 40
    x = 40/5
    x = 8

    5-|×-7|+2=7, utk x < 7
    -5x + 35 + 2 = 7
    -5x + 37 = 7
    -5x = 7 - 37
    -5x = -30
    x = -30/-5
    x = 6

    HP : {x = 8, x = 6}

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