Решите уравнение х - (7 целых 5/9-5 целых 1/6) = -3,5

x - (7 5/9 - 5 1/6) = - 3,5;

x - (7 - 5 + 5/9 - 1/6) = - 3,5;

x - (2 + (5 * 2) / (9 * 2) - (1 * 3) / (6 * 3)) = - 3,5;

x - (2 + 10/18 - 3/18) = - 3,5;

x - (2 + (10 - 3) / 18) = - 3,5;

x - (2 + 7/18) = - 3,5;

x - (2 7/18) = - 3,5;

x - 2 7/18 = - 3,5;

x = - 3,5 + 2 7/18;

x = - 3 5/10 + 2 7/18;

x = - 3 1/2 + 2 7/18;

x = - 3 + 2 - 1/2 + 7/18;

x = - 1 - (1 * 9) / (2 * 9) + 7/18;

x = - 1 - 9/18 + 7/18;

x = - 1 + 7/18 - 9/18;

x = - 1 + (7 - 9) / 18;

x = - 1 - 2/18;

x = - 1 - 2 / (2 * 9);

x = - 1 - 1/9;

x = - 1 1/9.

Ответ: х = - 1 1/8.