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Sagot :

VINS

Réponse :

[tex]bonjour\\\\6 x - 7 = 8 \\6 x = 8 + 7\\6 x = 15\\x = 15/6\\x = 5/2\\\\8 - 7 x = 57\\- 7 x = 57 - 8 \\- 7 x = 49\\x = - 7 \\\\[/tex]

Explications étape par étape :

Bonsoir

6x - 7 = 8

6x = 8 + 7

6x = 15

x = 5/2

8 - 7x = 57

-7x = 57 - 8

-7x = 49

x = -7

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