Odpowiedź:
[tex]e) \frac{3x - 5}{2} - \frac{5x - 1}{10} = 0 \: \: | \times 10 \\ 5(3x - 5) - (5x - 1) = 0 \\ 15x - 25 - 5x + 1 = 0 \\ 15x - 5x = 25 - 1 \\ 10x = 24 \\ x = 2.4[/tex]
[tex]f) \frac{x}{2} = \frac{2}{5} (4 - x) - 4 \\ \frac{x}{2} = \frac{8}{5} - \frac{2}{5} x - 4 \\ \frac{x}{2} = - \frac{12}{5} - \frac{2}{5} x \: \: \: \: | \times 10 \\ 5x = - 24 - 4x \\ 5x + 4x = - 24 \\ 9x = - 24 \\ x = - \frac{8}{3} [/tex]
[tex]g) \frac{2x - 1}{5} - \frac{x - 2}{2} = 0.7 \: \: \: | \times 10 \\ 2(2x - 1) - 5(x - 2) = 7 \\ 4x - 2 - 5x + 10 = 7 \\ 4x - 5x = 7 + 2 - 10 \\ - x = - 1 \\ x = 1[/tex]
[tex]h)2x - \frac{3x + 5}{4} = - \frac{1}{4} x - 1 \: \: \: \: | \times 4 \\ 8x - 3x - 5 = - x - 4 \\ 5x - 5 = - x - 4 \\ 5x + x = - 4 + 5 \\ 6x = 1 \\ x = \frac{1}{6} [/tex]
