Sagot :

helene94
Exercice 1:
a: 4+5=9 ducoup X=4
B:9+4=13 ducoup X=9
Exercice 2:
a. 5x5-25=0
b.3x2+1=7
Exercice 3:
a.3x3+2x2+5
b.4-5x8=9x4
lamgharikhadija07

Salut,

Exercice 1:

a.

on a 4+5=9 alors x=4.

b.

on a 17-4=13 alors x=17.