Réponse :
Hello,
A) 3x + 2 = 44 B) 7x + 15 = 6x +3
3x = 44 - 2 7x -6x = 3 -15
3x = 42 x = - 12
x = 42/3
x = 14 D) 2x + 7 = 9x -5
2x -9x = -5 -7
C) 5x - 3 = 2x +4 - 7x = -12
5x - 2x = 4+3 x = -12/-7 = 12/7
3x = 7
x = 7/3
E) 6( x+2 ) = 7x -22 + 2x
6x + 12 = 9x -22
6x - 9x = -22 -12
-3x = - 34
x = -34/-3 = 34/3
J’espère t'avoir aidé.....Salut
