I
[tex]3(x - 5) = 2x - 15 \\ 3x - 15 = 2x - 15 \\ x = 0[/tex]
Oznaczone
II
[tex]0.4(x + 5) - 3 = \frac{2}{5} x - 1 | \times 5 \\ 2(x + 5) - 15 = 2x - 5 \\ 2x + 10 - 15 = 2x - 5 \\ 2x - 5 = 2x - 5 \\ 0 = 0[/tex]
Tożsamościowe
III
[tex]4(x - 2) = 4x + 8 \\ 4x - 8 = 4x + 8 \\ 0 = 16[/tex]
Sprzeczne