------------------------
a. x = - 7 - 4 = - (7 + 4) = - 11
x = - 11
----------------------
b. 6 - 13 = x = - 7
----------------------
c. 4x = 10 + 2 = 12
x = 3
----------------------
d. 2 + 3 = 8x - 5x
5 = 3x
x = 5/3
----------------------
e. 6b + 14 = - 8b + 4
14 - 4 = - 8b - 6b
10 = - 14b
14b = - 10
7b = - 5
b = - 5/7
Aucun commentaire:
Enregistrer un commentaire