Mathématiques

Question

résoudre les Equiation suivantes
a. 3x + 2=14
b 3x-4=2x+9
c 3-(5-x) = 3 - 4x
d. 3(x+2)-(x-3)=x-5-3(x+1)+4x

2 Réponse

  • a. 3x + 2=14
    3x = 14 - 2
    3x = 12
    x = 12/3
    x = 4

    b 3x-4=2x+9
    3x - 2x = 9 + 4
    x = 13

    c 3-(5-x) = 3 - 4x
    3 - 5 + x = 3 - 4x
    x + 4x = 3 - 3 + 5
    5x = 5
    x = 5/5
    x = 1

    d. 3(x+2)-(x-3)=x-5-3(x+1)+4x

    3x + 6 - x + 3 = x - 5 - 3x - 3 + 4x
    3x - x - x + 3x - 4x = 5 - 3 - 6 - 3
    0x = - 7
    x = 0
  • a. 3x = 14-2 <=> x=12/3 = 4
    b. 3x-2x=9+4 <=> x= 13
    c. 3-5+x = 3-4x <=> x+4x = 3+2 <=> 5x=5 <=> x=1
    d. 3x+6-x+3 = x-5-3x-3+4x <=> 2x-x+3x-4x = -5-3-6-3 =-17

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