Mathématiques

Question

à l aide svp merci
7x=-1
_3x=12
-12X=-144
3x+2=5
-7x+2=-12

2 Réponse

  • 7x = - 1
    x = -1/7

    - 3x = 12
    -x = 12/3
    x = - 4

    -12x = - 144
    -x = - 144/12
    x = 12

    3x + 2 = 5
    3x = 5 - 2
    3x = 3
    x = 3/3
    x = 1

    -7x + 2 = - 12
    - 7x = - 12 - 2
    - 7x = - 14
    x = 14/7
    x = 2
  • 7x=-1    x=-1/7

    -3x=12      x=-12/3=-4

    -12x=-144    x=-144/-12=12

    3x+2=5    3x=5-2=3    x=3/3=1

    -7x+2=-12      -7X=-12-2=-14    x=-14/-7=2

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