Réponse :
[tex]bonjour\\\\3 x + 7 = - 13 - 2 x \\3 x + 2 x = - 13 - 7\\5 x = - 20\\x = - 4 \\\\6 x - 9 = 27\\6 x = 27 + 9\\6 x = 36\\x = 6 \\\\6 x - 18 = 3 x\\6 x - 3 x = 18\\3 x = 18 \\x = 6 \\\\\\2 x - 9 = - 15 x - 21 \\2 x + 15 x = - 21 + 9\\17 x = - 12\\x = - 12/17\\\\0.5 x - 2.6 = 3 x + 1.4\\0.5 x - 3 x = 1.4 + 2.6 \\- 2.5 x = 4 \\x = - 1.6\\\\8 x = - x + 0.6 \\8 x + x = 0.6\\9 x = 0.6 \\x = 6/90 = 1/15 \\\\[/tex]
Explications étape par étape :
