2 (3x-7) = - 3 (2x-5) - 2 (2x+5) + (3x+17) - (8x+5) = 15

Найдем корни.

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

Скобки раскроем.

2 * 3 * x - 2 * 7 = - 3 * 2 * x + 3 * 5;

6 * x - 14 = - 6 * x + 15;

6 * x + 6 * x = 15 + 14;

12 * x = 31;

x = 31/12.

2) - 2 * (2 * x + 5) + (3 * x + 17) - (8 * x + 5) = 15;

-2 * x * 2 - 2 * 5 + 3 * x + 17 - 8 * x - 5 = 15;

-4 * x - 10 + 3 * x - 8 * x + 17 - 5 = 15;

-4 * x + 3 * x - 8 * x - 10 + 12 = 15;

-x - 8 * x + 2 = 15;

-9 * x = 15 - 2;

-9 * x = 13;

x = - 13/9.