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Sagot :

TELEPHONE16

Réponse :

Bonsoir

Explications étape par étape

4x +7 = 19

4x = -7 +19

4x = +12

x = 12/4

x = 3

Vérification

4x +7 = 19

4 X 3 + 7 = 19

12 +7 = 19

19 = 19

-5x +6 =-4

-5x = -6 -4

-5x -10

x = 10/5

x = 2

Vérification

-5x +6 = -4

-5 X 2 = -6 -4

-10 = -10

7x -5 = 16

7x = +5 +16

7x = +21

x = 21/7

x = 3

Vérification

7x -5 = 16

7 X 3 -5 = 16

21 -5 = 16

16 = 16

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