Répondre :
bonjour
f (x) = - 3 x + 7
f ( 8) = 8 * - 3 + 7 = - 24 + 7 = - 17
f ( 0 ) = 7
- 3 x + 7 = 2
- 3 x = 2 - 7
- 3 x = - 5
x = 5/3
bon WE
bonjour
f (x) = - 3 x + 7
f ( 8) = 8 * - 3 + 7 = - 24 + 7 = - 17
f ( 0 ) = 7
- 3 x + 7 = 2
- 3 x = 2 - 7
- 3 x = - 5
x = 5/3
bon WE