Bonjour, quelqu'un peut-il m'aider? Merci d'avance! a.x - 5/4 = 4/3 b.x + 7/3 = 5/7 c.x - 5/8 = 3/12 d. 1/3 - x = -2/9 e. 5/18 - x = 11/ 45 f. x - 12/25 = -11/

Réponse :

Explications étape par étape

Bonjour,

a.

x - 5/4 = 4/3

x = 4/3 +5/4 = 16/12 + 15/12 = 31/12

b.

x + 7/3 = 5/7

x=5/7 -7/3 = 15/21 - 49/21 = -34/21

c.

x - 5/8 = 3/12

x = 3/12 +5/8 = 6/24 + 15/24 = 21/24 = 7/8

d.

1/3 - x = -2/9

1/3 +2/9 = x

3/9 +2/9 = x

x= 5/9

e.

5/18 - x = 11/ 45

5/18 -11/45 =x

25/90 - 22/90 = x

x = 3/90= 1/30

f.

x - 12/25 = -11/15

x = -11/15 + 12/25

x = -110/150 + 72/150

x= - 38/150 = -19/ 75