Répondre :
bonjour
a = b + 4
a +7 = b + 4 + 7 = b + 11
a - 5 = b + 4 - 5 = b - 1
2 a = 2 ( b + 4 ) = 2 b + 8
- b / 6 = - b - 4 / 6
bonjour
a = b + 4
a +7 = b + 4 + 7 = b + 11
a - 5 = b + 4 - 5 = b - 1
2 a = 2 ( b + 4 ) = 2 b + 8
- b / 6 = - b - 4 / 6