Помогите пожалуйстаP.S : 6 класс

Решите задачу:

$1)(2 \frac{2}{3} - 1 \frac{1}{6} )a = 1 \frac{4 - 1}{6} a = 1 \frac{1}{2}a = \frac{3}{2} \times \frac{2}{3} = 1 \\ 2)30 \div 5 \times 2 = 12 \: na \: primery \\ 30 - 12 = 18 \: minut \: ostavshee \\ 18 \div 9 \times 5 = 10 \: minut \: reshala \: zadachu \\ ( \frac{5}{6} x + \frac{1}{7} x) \times 42 = 82 \\ \frac{35 + 6}{42} x = \frac{82}{42} \\ \frac{41}{42} x = \frac{82}{42} \\ x = \frac{82}{42} \div \frac{41}{42} = \frac{82 \times 42}{42 \times 41} \\ x = 2 \\$