Odpowiedź:
[tex]f) \frac{x}{2} = \frac{2}{5} (4 - x) - 4 \\ \frac{x}{2} = \frac{8}{5} - \frac{2}{5} x - 4 \: \: \: \: \: | \times 10 \\ 5x = 16 - 4x - 40 \\ 5x + 4x = 16 - 40 \\ 9x = - 24 \\ x = - \frac{24}{9} = - \frac{8}{3} [/tex]
[tex]g) \frac{2x - 1}{5} - \frac{x - 2}{2} = 0.7x \: \: \: \: | \times 10 \\ 2(2x - 1) - 5(x - 2) = 7x \\ 4x - 2 - 5x + 10 = 7x \\ - x + 8 = 7x \\ - x - 7x = - 8 \\ - 8x = - 8 \\ x = 1[/tex]
