Mathématiques

Question

aidez moi svp
8(3x+7)=x+5(x-1)
8x+1/2=4x+3
-10x+6=-4x+1
2(x+3)-2x=4x+3+(-1)
5x+(-9+5)=-(3x+1)+2

1 Réponse

  • 8(3x+7)=x+5(x-1)
    24x + 56 = x + 5x - 5
    24x - x - 5x = - 5 - 56
    18x = - 61
    x = 61/18

    8x+1/2=4x+3
    16x/2 + 1/2 = 8x/2 + 6/2
    16x - 8x = 6 - 1
    8x = 5
    x = 5/8

    -10x+6= - 4x+1
    - 10x + 4x = 1 - 6
    - 6x = - 5
    x = 5/6

    2(x+3)-2x=4x+3+(-1)
    2x + 6 - 2x = 4x + 3 - 1
    2x - 2x - 4x = + - 1 - 6
    - 4x = - 7
    x = 7/4

    5x+(-9+5)=-(3x+1)+2

    5x - 9 + 5 = 3x + 1 + 2
    5x - 3x = 1 + 2 + 9 - 5
    2x = 7
    x = 7/2
    x = 3,5

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