Besoins d’aide svp merci d’avance

Bonjour,

x= 5

t= 28/4 = 7

6t = -42

t= -42/6 =7

t= 3+7= 10

x= -6,7

t = 28/5 =5,6

-2t = -8

t = -8/-2 = 4

x= 5+14 = 19

8x+18 + 0

8x =-18

x = -18/8 =-2,25

2x = 16 -10

2x = 6

x= 6/2 = 3

5t = -7-28

5t = -35

t = -35/5 = -7

5x-2x = 9

3x= 9

x= 9/3 = 3