ПОМОГИТЕ ПОЖАЛУЙСТА РЕШИТЬ!

Решите задачу:

$1)\frac{6}{5}x = \frac{3}{5}\\\\x = \frac{3}{5} : \frac{6}{5} \\\\x = \frac{3}{5} * \frac{5}{6} \\\\x = \frac{1}{2} \\$

$2)\frac{4}{7} x = 1\\ \\x =1: \frac{4}{7} \\\\x = 1 * \frac{7}{4} \\\\x = 1 \frac{3}{4}$

$3)\frac{3}{4} x = 12\\\\x = 12 : \frac{3}{4} \\\\x = 12 * \frac{4}{3} \\\\x = 16$

$4) 3x = \frac{2}{3} \\\\x = \frac{2}{3} : 3\\\\\\x = \frac{2}{3} * \frac{1}{3}\\\\x = \frac{2}{9} \\$

$5)x : \frac{7}{15} = \frac{15}{28} \\\\x * \frac{15}{7} = \frac{15}{28} \\\\x = \frac{15}{28} : \frac{15}{7}\\ \\x = \frac{15}{28} * \frac{7}{15} \\\\x = \frac{1}{4}$

$6)5\frac{1}{4} : x = \frac{7}{8} \\\\\frac{21}{4} : x = \frac{7}{8}\\\\\frac{\frac{21}{4} }{x} = \frac{7}{8} \\\\7x = 8 * \frac{21}{4}\\ \\7x = 42\\\\x = 6$