bjr

but du jeu : trouver la valeur de x

4 + x = -7

x = -7-4

x = -11

6 - x = 13

6 - 13 = x

x = -7

4x - 2 = 10

4x = 10+2

x = 12/4

x = 3

5x - 8x = -3 - 3

-3x = -6

x = 2