Sagot :
Bonjour,
5x + 1 = 16
5x= 16-1
5x = 15
x= 15/5
x= 3
2x - 9 = 17
2x = 17+9
2x = 26
x= 26/2
x= 13
Bonjour,
5x + 1 = 16
5x = 16 - 1
5x = 15
x = [tex]\frac{15}{5}[/tex]
x = 3
2x - 9 = 17
2x = 17 + 9
2x = 26
x = [tex]\frac{26}{2}[/tex]
x = 13
En espérant t'avoir aidé :)