Bonjour c’est pour l’exercice 37 en maths merci beaucoup :)

Bonjour
a.
f (x) = x - 5
f (- 3) = - 3 - 5
f (- 3) = - 8
b.
f (x) = x - 5 = 7
x - 5 = 7
x = 7 + 5
x = 12
c.
f (x) = x - 5
f (7) = 7 - 5
f (7) = 2
d.
f (x) = x - 5 = 4
x - 5 = 4
x = 4 + 5
x = 9.