[tex]0.9a - 1.5 = 1 \frac{7}{8} [/tex]
[tex]0.9a - \frac{3}{2} = \frac{15}{8} [/tex]
[tex]0.9a = \frac{15}{8} + \frac{3}{2} [/tex]
[tex]0.9a = \frac{27}{8} \: \: \: ( \div 0.9[/tex]
[tex]a = \frac{15}{4} = 3 \frac{3}{4} [/tex]
Mam nadzieję że pomogłam ❤️
