👤
Answered

Bonsoir quelqu'un peut m'aider à résoudre ses deux équations je n'y arrive pas Merci d'avance :)

c) 4x -1 = 5x + 3


d) 2/5 - 1/2x = -x - 2

Sagot :

THOMAS756

Bonsoir,

c)

4x - 1 = 5x + 3

<=> 4x - 1 - 3 - 4x = 5x + 3 - 3 - 4x

<=> -4 = x

<=> x = -4

d)

2/5 - 1/2x = - x - 2

<=> 2/5 - 1/2x + 1/2x + 2 = - x - 2 + 1/2x + 2

<=> 2/5 + 10/5 = -2/2 x + 1/2x

<=> 12/5 = - 1/2 x

<=> 12/5 * (-2) = -1/2 x * (-2)

<=> - 24/5 = x

<=> x = -24/5

Bonne soirée,

Thomas

INESPARIS2024

Réponse :

c) 4x - 1 = 5x + 3

4x - 1 - 3 = 5x + 3 - 3

4x - 4 = 5x

4x - 4x - 4 = 5x - 4x

- 4 = x

d) 2/5 - 1/2x = -x - 2

2/5 - 2/5 - 1/2x = -x - 2 - 2/5

-1/2x = -x - 12/5

-1/2x + x = -x + x - 12/5

1/2x = -12/5

2*(1/2x) = 2*(-12/5)

x = -24/5

* = signe "multiplié"

j'espère t'avoir aidé !

Other Questions

© 2024 IDNLearn. All rights reserved.