besoin d'aide svp ....urgent

bonjour

E = 10 x + 15 + 12 x + 6
e =  22 x + 21

F = 12 x - 24 - 12 + 15 x
F = 27 x - 36

G = 3 x + 5 + 4 x - 8
g = 7 x + 13

H = 2 x - 7 - 4 x - 3
H = - 2 x - 10