Реши уравнения: 3) (x-7/15)+5/8=17/24, 4) 4/5-(x+1/60)=2/3, 5) 4 3/4-(x-2 5/8)=3 5/6, 6) 9 9/28-(4 5/21-x)=6 2/7.

Решаю уравнения. 3) $(x - \frac{7}{15}) + \frac{5}{8} = \frac{17}{24}$ $x - \frac{7}{15} = \frac{17}{24} - \frac{5}{8}$ $x - \frac{7}{15} = \frac{17}{24} - \frac{15}{24}$ $x - \frac{7}{15} = \frac{2}{24}$ $x = \frac{1}{12} + \frac{7}{15}$ $x = \frac{5}{60} + \frac{28}{60}$ $x = \frac{33}{60}$ $x = \frac{11}{20}$ **Ответ: $x = \frac{11}{20}$** 4) $\frac{4}{5} - (x + \frac{1}{60}) = \frac{2}{3}$ $\frac{4}{5} - x - \frac{1}{60} = \frac{2}{3}$ $-x = \frac{2}{3} - \frac{4}{5} + \frac{1}{60}$ $-x = \frac{40}{60} - \frac{48}{60} + \frac{1}{60}$ $-x = \frac{-7}{60}$ $x = \frac{7}{60}$ **Ответ: $x = \frac{7}{60}$** 5) $4\frac{3}{4} - (x - 2\frac{5}{8}) = 3\frac{5}{6}$ $\frac{19}{4} - x + \frac{21}{8} = \frac{23}{6}$ $-x = \frac{23}{6} - \frac{19}{4} - \frac{21}{8}$ $-x = \frac{92}{24} - \frac{114}{24} - \frac{63}{24}$ $-x = \frac{-85}{24}$ $x = \frac{85}{24}$ $x = 3\frac{13}{24}$ **Ответ: $x = 3\frac{13}{24}$** 6) $9\frac{9}{28} - (4\frac{5}{21} - x) = 6\frac{2}{7}$ $\frac{261}{28} - ( \frac{89}{21} - x) = \frac{44}{7}$ $\frac{261}{28} - \frac{89}{21} + x = \frac{44}{7}$ $x = \frac{44}{7} - \frac{261}{28} + \frac{89}{21}$ $x = \frac{528}{84} - \frac{783}{84} + \frac{356}{84}$ $x = \frac{101}{84}$ $x = 1\frac{17}{84}$ **Ответ: $x = 1\frac{17}{84}$**