Niveau 3eme maths ex 29 page 94 Resoudre chaque equation : -3 + x = 7 5x = 19 3x + 7x = 50 x + 8 = 11 -2x = 9 -4x + 9x =45 Merciiiiiiiiiiiiiiiiiiiiii

Bonsoir

Résoudre chaque équation :

-3 + x = 7

x = 7 + 3

x = 10

5x = 19

x = 19/5

3x + 7x = 50

10x = 50

x = 50/10

x = 5

x + 8 = 11

x = 11 - 8

x = 3

-2x = 9

x = - 9/2

-4x + 9x =45

5x = 45

x = 45/5

x = 9.