Решите уравнение a) (3x+5) + (8x+1) = 17 б) (3 -

Найдем корни.

a) (3 * x + 5) + (8 * x + 1) = 17; 

Скобки раскроем.

3 * x + 5 + 8 * x + 1 = 17;

(3 * x + 8 * x) + (5 + 1) = 17;

x * (3 + 8) + 6 = 17;

x * 11 + 6 = 17;

11 * x + 6 = 17;

11 * x = 17 - 6;

11 * x = 11;

x = 11/11;

x = 1.

б) (3 - 5,8 * x) - (2,2 * x + 3) = 16; 

3 - 5.8 * x - 2.2 * x - 3 = 16; 

-5.8 * x - 2.2 * x + 3 - 3 = 16; 

-5.8 * x - 2.2 * x = 16; 

5.8 * x + 2.2 * x = -16; 

6 * x + 2  * x = -16; 

8 * x = -16; 

x = -16/8; 

x = -2.