Réponses

2013-04-07T22:04:09+02:00

A) 3x=9(x-8)

3x = 9x - 72

6x = 72

x = 72/6

x = 12

 

B) 10x-3(2x-15)=7x

10x - 6x + 45 = 7x

3x = 45

x = 45/3

x = 15

 

E nespérant t'avoir aidé.