1) 3x + 7 = 13 b) 15x -2 = 28 c) 5x +8 = -12 et d) 2x + 11 = 5 Svp a faire avant ce soir merci d'avance

Bonjour,

1) 3x + 7 = 13

3x = 13-7

3x = 6

x= 6/3

x= 2

b) 15x -2 = 28

15x = 28+2

15x = 30

x= 30/15

x=2

c) 5x +8 = -12

5x= -12 -8

5x = -20

x= -20/5

x= -4

d) 2x + 11 = 5

2x = 5 -11

2x = -6

x= -6/2

x= -3