Bonjour, qui peut m'aider svp :) a. 4 + x = - 7 b. 6 - x = 13 c. 4 x - 2 = 10

Réponse :

Bonjour,

a. 4 + x = - 7

a. 4 + x - 4 = - 7 - 4

a. x = - 11

b. 6 - x = 13

b. 6 - x - 6 = 13 - 6

b. - x = 7

b. x = - 7

c.  4 x - 2 = 10

c. 4 x - 2 + 2 = 10 + 2

c. 4 x = 12

c. x = 12 /4

c. x = 3

Voila bonne journée..

[tex]bonjour\\\\\\\\4 + x = - 7\\x = - 7 - 4 \\x = - 11 \\\\\\6- x = 13\\- x = 13 - 6 \\- x = 7\\x = - 7 \\\\\\4 x - 2 = 10\\4 x = 10 + 2\\4 x = 12\\x = 3 \\\\\\[/tex]