Bonjour pouvez-vous m’aider svppp à ces ex :x+7=11 ,3x=21, x-5=12 5x=11 3+x=21 Xx5=12 4x+7=11 5x+4=11 5x-8=11

Réponse :

x + 7 = 11

x = 11 - 7

x = 4

3x = 21

x = 21/3

x = 7

x - 5 = 12

x = 12 + 5

x = 17

5x = 11

x = 11/5

x = 2,2

3 + x = 21

x = 21 - 3

x = 18

Xx5 = 12

5x = 12

x = 12/5

x = 2,4

4x + 7 = 11

4x = 11 - 7

4x = 4

x = 4/4

x = 1

5x + 4 = 11

5x = 11 - 4

5x = 7

x = 7/5

x =1,4

5x - 8 = 11

5x = 11 + 8

5x = 19

x = 19/5

x = 3,8

Réponse :

7-5=12

3+18=21

2,4x5=12

4+7=11

5+2+4=11

Explications étape par étape :