[tex]( \frac{x - 0.5}{3} + 1) \times \frac{4}{5} + x = - 2.5 | \times 10 \\ ( \frac{x - 0.5}{3} + 1) \times 8 + 10x = - 25 \\ \frac{8x - 4}{3} + 8 + 10x = - 25 | \times 3 \\ 8x - 4 + 24 + 30x = - 75 \\ 38x = - 75 - 20 \\ 38x = - 95 | \div 38 \\ \boxed{x = - 2.5}[/tex]
Sprawdzenie
[tex] \frac{( - 2.5 - 0.5}{3} + 1) \times \frac{4}{5} + ( - 2.5) = - 2.5 \\( \frac{ - 3}{3} + 1) \times \frac{4}{5} - 2.5 = - 2.5 \\ ( - 1 + 1) \times \frac{4}{5} - 2.5 = - 2.5 \\ 0 \times \frac{4}{5} - 2.5 = - 2.5 \\ 0 - 2.5 = - 2.5 \\ - 2.5 = - 2.5 \\ L = P[/tex]
