Réponse :
[tex]bonjour\\\\8 x = 20\\x = 20/8 = 2.5\\\\- 12 x = 36\\x = - 36/12 = - 3 \\\\\\x + 7 = 20\\x = 20 - 7\\x = 13 \\\\x - 12 = 3.5 \\x = 3.5 + 12\\x = 15.5 \\\\x + 1.6 = 4.2\\x = 4.2 - 1.6\\x = 2.6 \\\\14 = x - 48 \\- x = - 48 - 14\\- x = - 62 \\x = 62 \\\\[/tex]
Explications étape par étape :
