Решить уравнение: 1) 6 (5/6x-1 2/3)=17 2) 9 (5/9x - 1

1) 6 * (5/6 * x - 1 2/3) = 17;

6 * (5/6 * x - 5/3) = 17;

Раскрываем скобки:

6 * 5/6 * x + 6 * (- 5/3) = 17;

5 * x - (6 * 5)/3 = 17;

5 * x - 30/3 = 17;

5 * x - 10 = 17;

5 * x = 17 + 10;

5 * x = 27;

x = 27 : 5;

x = 5 2/5.

Ответ: 5 2/5.

2) 9 * (5/9 * x - 1 1/3) = 7;

9 * (5/9 * x - 4/3) = 7;

9 * 5/9 * x + 9 * (- 4/3) = 7;

5 * x - 9 * 4/3 = 7;

5 * x - 12 = 7;

5 * x = 7 + 12;

5 * x = 19;

x = 19 : 5;

x = 3 4/5.

Ответ: 3 4/5.