Mathématiques

Question

Resoudre les equations
7-4x=-3+2x
3(5-2x)=7-4x
3-(2x-4=x+7

1 Réponse

  • 7 - 4x = - 3 + 2x
    - 4x - 2x = - 3 - 7
    - 6x = - 10
    x = 10 / 6

    3 ( 5 - 2x ) = 7 - 4x
    15 - 6x = 7 - 4x
    - 6x + 4x = 7 - 15
    - 2x = - 8
    x = 8 / 2
    x = 4

    3 - ( 2x - 4 ) = x + 7
    3 - 2x + 4 = x + 7
    - 2x - x = 7 - 3 - 4
    - 3x = 4 - 4
    x = 0

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