Odpowiedź:
[tex]5x \times x - 7 - x = 9 - 2 \times x - 4 \\ 4x - 7 = 5 - 2x \\ 4x + 2x = 5 + 7 \\ 6x = 12 \\ x = 2[/tex]
Liczę na naj.
5x - 7 - x = 9 - 2x - 4 = 4x - 7 = 9 - 2x - 4 = 4x - 7 = 5 - 2x = 4x + 2x - 7 = 5 = 4x + 2x = 5 + 7 = 6x = 5 + 7 = 6x = 12
6x = 12
x = 2
