bonjour
g (x) = - 7 + 4 x
g ( - 9 ) = - 7 - 36 = - 43
g (0) = - 7
g (3) = - 7 + 12 = 5
g ( 10/3) = - 7 + 40/3 = - 21/10 + 40/3 = 19/3
- 7 + 4 x = - 9
4 x = - 9 + 7 = 2
x = 1/2
- 7 + 4 x = 0
4 x = 7
x = 7/4
- 7 + 4 x = 10/3
4x = 10/3 + 7
12 x /3 = 10 /3 + 21/3
12 x = 31
x = 31/12