bjr
6 x a = 7
a = 7/6
12 x a = 5
a = 5/12
18 x a = 67
a = 67/18
et
7 x a = 98
a = 98/7
Réponse:
Bonsoir,
a.
6×a=7
a=7/6
b.
12×a =5
a=5/12
c.
18×a=67
a=67/18
d.
7×a=98
a=98/7
bon courage
