Реши уравнения: a) x + 2 3/16 = 3 1/8

Решаю уравнения! a) $x + 2 \frac{3}{16} = 3 \frac{1}{8}$ $x = 3 \frac{1}{8} - 2 \frac{3}{16}$ $x = 3 \frac{2}{16} - 2 \frac{3}{16}$ $x = \frac{49}{16} - \frac{35}{16} = \frac{14}{16}$ $x = \frac{7}{8}$ б) $x - 1 \frac{3}{4} = 2 \frac{11}{12}$ $x = 2 \frac{11}{12} + 1 \frac{3}{4}$ $x = 2 \frac{11}{12} + 1 \frac{9}{12}$ $x = 3 \frac{20}{12} = 4 \frac{8}{12}$ $x = 4 \frac{2}{3}$ в) $\frac{2}{9} : x = \frac{7}{18}$ $x = \frac{2}{9} : \frac{7}{18}$ $x = \frac{2}{9} * \frac{18}{7} = \frac{2 * 2}{7}$ $x = \frac{4}{7}$ г) $\frac{3}{5} * x = \frac{6}{7}$ $x = \frac{6}{7} : \frac{3}{5}$ $x = \frac{6}{7} * \frac{5}{3} = \frac{2 * 5}{7}$ $x = \frac{10}{7} = 1 \frac{3}{7}$ д) $x : (1 \frac{2}{3} + \frac{4}{9}) = \frac{9}{38}$ $x : (\frac{5}{3} + \frac{4}{9}) = \frac{9}{38}$ $x : (\frac{15}{9} + \frac{4}{9}) = \frac{9}{38}$ $x : \frac{19}{9} = \frac{9}{38}$ $x = \frac{9}{38} * \frac{19}{9} = \frac{1}{2} * \frac{1}{1}$ $x = \frac{1}{2}$ е) $(8 \frac{1}{2} - 7 \frac{1}{4}) * x = \frac{5}{12}$ $(\frac{17}{2} - \frac{29}{4}) * x = \frac{5}{12}$ $(\frac{34}{4} - \frac{29}{4}) * x = \frac{5}{12}$ $\frac{5}{4} * x = \frac{5}{12}$ $x = \frac{5}{12} : \frac{5}{4}$ $x = \frac{5}{12} * \frac{4}{5} = \frac{1}{3} * \frac{1}{1}$ $x = \frac{1}{3}$