Реши уравнение: a) x + 2(3/16) = 3(1/8)

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