svp aidez moi !! merci d avance :-)

Réponse :

Explications étape par étape

Bonsoir

(2x + 1)/(-3 + x) = 3/2

[tex]-3 + x \ne 0[/tex]

[tex]x \ne 3[/tex]

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

4x + 2 = -9 + 3x

4x - 3x = -9 - 2

x = -11

14/-6 = 18/-2x

[tex]-2x \ne 0[/tex]

[tex]x \ne 0[/tex]

-2x * 14 = 18 * (-6)

-28x = -108

x = -108/-28

x = (27 * 4)/(7 * 4)

x = 27/7

Exercice 11 :

L = (3x - 2)/6 + (7x + 5)/12

L = 2(3x - 2)/(2 * 6) + (7x + 5)/12

L = (6x - 4)/12 + (7x + 5)/12

L = (6x - 3 + 7x + 5)/12

L = (13x + 2)/12

Calculer L pour x = 2/13

L = (13 * 2/13 + 2)/12

L = (2 + 2)/12

L = 4/12

L = 4/(3 * 4)

L = 1/3