Réponse :
[tex]bonjour\\\\\\- 2 + x = 5\\x = 5 + 2 \\x = 7 \\\\x + 9 = 16\\x = 16 - 9\\x = 7 \\\\6 x = 15 \\x = 15/6 = 5/2 \\\\- 5 x = 24 \\x = - 24/5\\\\4 x + 3 x = 49\\7 x = 49 \\x = 7 \\\\- 2 x + 7 x = 36 \\5 x = 36 \\x = 36 /5 \\\\[/tex]
Explications étape par étape :