Bonjours niveau 3eme svp Résoudre x+4=11 x-5=11 x*+4=11. *= 2 x*-5=11. x*=+7

a) x+4=11
x = 11 - 4
x = 7

b) x - 5=11
 x = 11 + 5
x = 16

c) x²+4=11
 x² = 11 - 4
x² = 7
x = √7


   

x + 4 = 11 
x = 11-4
x = 7

x - 5 = 11
x = 11 + 5
x = 16

x* + 4 = 11
x* = 11-4
x* = 7
x = [tex] \sqrt{7} [/tex]

x* - 5 = 11
x* = 11+5
x* = 16
x = [tex] \sqrt{16} [/tex]
x = 4

x* = 7
x = [tex] \sqrt{7} [/tex]