Odpowiedź:
[tex]d)5x + 7 = 6x + 12 \\ 5x - 6x = 12 - 7 \\ - x = 5 \\ x = - 5 \\ e) - 6 - 2x = 4x + 6 \\ - 2x - 4x = 6 + 6 \\ - 6x = 12 \\ x = - 2 \\ [/tex]
[tex]f)4x + 10 = 16 - 2x \\ 4x + 2x = 16 - 10 \\ 6x = 6 \\ x = 1[/tex]
