Exercice n°1 silvouplait je galère . Bonjour a tous !

exo 2 :

1) T1 = 5x
T2 = 3x+80

2) 3x+80<5x
3x-5x<-80
x>40

exo 1 :

x =le prix total

x/3 + 40x/100 + 132 = x

x/3 + 4x/10 + 132 = x

(10x+12x+3960)/30 = 30x/30

22x+3960 = 30x

22x-30x = -3930

8x = 3960

x = 495e