Mathématiques

Question

Equations
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a. 4x = 2x + 3.
b. 7x - 2 = 5-x
c. 11 + 8x = 2-3x
d. 6 - 3x = -x+1

2 Réponse

  • a) 4x=2x+3
    4x-2x=3
    2x=3
    x=3/2

    b) 7x-2=5-x
    7x+x=5-2
    8x=3
    x=3/8

    c) 11+8x=2-3x
    8x+3x=2-11
    11x=-9
    x=-9/11

    d) 6-3x=-x+1
    3x-x=6-1
    2x=5
    x=5/2
  • 4x = 2x + 3
    4x - 2x = 3
    2x = 3
    x = 3/2

    7x - 2 = 5 - x
    7x + x = 5 + 2
    8x = 7
    x = 7/8

    11 + 8x = 2 - 3x
    8x + 3x = 2 - 11
    11x = - 9
    x = - 9/11

    6 - 3x = - x + 1
    6 - 1 = - x + 3x
    5 = 2x
    5/2 = x

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