Odpowiedź:
[tex]0.9a - 1.5 = 1 \frac{7}{8} \\ 0.9a = \frac{15}{8} + \frac{15}{10} \\ 0.9a = \frac{75}{40} + \frac{60}{40} \\ 0.9a = \frac{135}{40} \: \: \: | \div 0.9 \\ a = \frac{135}{40} \times \frac{10}{9} \\ a = \frac{15}{4} [/tex]
spr.
[tex]0.9 \times \frac{15}{4} - 1.5 = 1 \frac{7}{8} \\ \frac{9}{10} \times \frac{15}{4} - \frac{3}{2} = \frac{15}{8} \\ \frac{9}{2} \times \frac{3}{4} - \frac{3}{2} = \frac{15}{8} \\ \frac{27}{8} - \frac{3}{2} = \frac{15}{8} \\ \frac{15}{8} = \frac{15}{8} [/tex]
L=P
