Odpowiedź:
[tex]a)\ \ \frac{4}{3}x+\frac{5}{8}x=(\frac{4}{3}+\frac{5}{8})x=(\frac{32}{24}+\frac{15}{24})x=\frac{47}{24}x=1\frac{23}{24}x\\\\b)\ \ 1,2x+\frac{2}{3}x=(1,2+\frac{2}{3})x=(\frac{12}{10}+\frac{2}{3})x=(\frac{6}{5}+\frac{2}{3})x=(\frac{18}{15}+\frac{10}{15})x=\frac{28}{15}x=1\frac{13}{15}x\\\\c)\ \ \frac{1}{4}x+\frac{5}{6}x-\frac{1}{2}x=(\frac{1}{4}+\frac{5}{6}-\frac{1}{2})x=(\frac{3}{12}+\frac{10}{12}-\frac{6}{12})x=\frac{7}{12}x[/tex]
[tex]d)\ \ \frac{3}{7}x-0,2x+x=(\frac{3}{7}-0,2+1)x=(\frac{3}{7}-\frac{1}{5}+1)x=(\frac{15}{35}-\frac{7}{35}+1)x=(\frac{8}{35}+1)x=\\\\=1\frac{8}{35}x[/tex]
