[tex]bonjour\\\\5 x - 2 = 4 \\5 x = 4 + 2\\5 x = 6\\x = 6/5\\\\3 x - 1 = 4 \\3 x = 4 + 1 \\3 x = 5 \\x = 5 /3 \\\\4 ( 3 - 2 x ) = ( 5 x - 1 ) - ( 2 x + 3 ) \\12 - 8 x = 5 x - 1 - 2 x - 3 \\- 8 x - 5 x + 2 x = - 1 - 3 - 12 \\- 11 x = - 16\\x = 16/11[/tex]