bonjour
[tex]x - 2 = 5\\x = 5 + 2\\x = 7\\\\3 x = 21\\x = 7\\\\x - 4 = 7\\x = 7 + 4\\x = 11 \\\\x /5 = 8 \\x = 40\\\\3 x - 2 = 4 \\3 x = 4 + 2 \\3 x = 6\\x = 2\\\\2 x + 3 = x - 4 \\2 x - x = - 4 - 3 \\x = - 7 \\\\4 x + 2 = 2 x + 6\\4 x - 2 x = 6 - 2 \\2 x = 4 \\x = 4/2 = 2 \\\\2 x + 4 = 0 \\2 x = - 4 \\x = - 2 \\\\ - x + 1/2 = 0 \\ - x = - 1/2 \\x = 0.5 \\\\- x /3 + 3 /2 = 0 \\- 2 x /6 + 9 /6 = 0\\- 2 x = - 9 \\x = 9/2 \\\\4 x /3 - 5/3 = 0 \\4 x = 5\\x = 5/4 \\\\[/tex]
[tex]- ( - 2 x + 1 ) = 4\\2 x - 1 = 4\\2 x = 4 + 1\\2 x = 5 \\x = 5/2 \\\\- 2 ( - x + 3 ) + 4 ( x - 5 ) = - 2 x + 1 \\2 x - 6 + 4 x - 20 = - 2 x + 1 \\6 x + 2 x = 1 + 6 + 20 \\8 x = 27\\x = 27/8[/tex]