Реши уравнение 2 1/7:b=2 19/28:3 3/4

[latex]2 \frac{1}{7} : b = 2 \frac{19}{28} : 3 \frac{3}{4} \\ \\ 2 \frac{19}{28} b = 2 \frac{1}{7} : 3 \frac{3}{4} \\ \\ \frac{75b}{28} = \frac{15}{7} : \frac{15}{4} \\ \\ \frac{75b}{28} = \frac{15}{7} * \frac{4}{15} \\ \\ \frac{75b}{28} = \frac{4}{7} \\ \\ \frac{75b}{28} = \frac{16}{28} \\ \\ 75b = 16 \\ \\ b = \frac{16}{75} [/latex]