Verified answer

bonjour

16 + x = - 3

x = - 3 - 16

x = - 19

3 x - 5 = 7

3 x = 7 + 5

3 x = 12

x = 4

9 x + 6 = 4 - 5 x

9 x + 5 x = 4 - 6

14 x = - 2

x = -  1/7

Bonjour,

Résoudre:

• 16 + x = -3

x= -3-16

x= -19

S= { -19 }

• 3x - 5 = 7

3x= 7+5

x= 12/3

x= 4

S= { 4 }

• 9x + 6 = 4 - 5x

9x+5x= 4-6

14x= -2

x= -2/14

x= -1/7

S= { - 1/7 }