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Sagot :

LOULAKAR

Réponse :

Explications étape par étape

Bonsoir

Résoudre :

x + 5 = 9

x + 5 - 5 = 9 - 5

x = 4

x - 4 = 13

x - 4 + 4 = 13 + 4

x = 17

-7 = x - 3

-7 + 3 = x - 3 + 3

x = -4

7x = 21

7x/7 = 21/7

x = 3

-3x = 12

-3x/-3 = 12/-3

x = -4

5x = -3

5x/5 = -3/5

x = -3/5

5x - 25 = 0

5x - 25 + 25 = 0 + 25

5x = 25

5x/5 = 25/5

x = 5

3x + 1 = 7

3x + 1 - 1 = 7 - 1

3x = 6

3x/3 = 6/3

x = 2

7x + 13 = -2

7x + 13 - 13 = -2 - 13

7x = -15

7x/7 = -15/7

x = -15/7

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