Решите уравнения: A) 3,2 (5x-1) = 3,6x-9,4. Б) 1,2 * (3K+5) = 2 * (2,4k-3,6)

A) 3,2 * (5 * x - 1) = 3,6 * x - 9,4;

Найдем корни. Скобки раскроем.

3.2 * 5 * x - 3.2 * 1 = 3.6 * x - 9.4;

16 * x - 3.2 = 3.6 * x - 9.4;

16 * x - 3.6 * x = - 9.4 + 3.2;

13 * x - 0.6 * x = - 6 - 0.2;

12.4 * x = - 6.2;

x = - 6.2/12.4;

x = - 0.5.

Б) 1,2 * (3 * k + 5) = 2 * (2,4 * k - 3,6);

1.2 * 3 * k + 1.2 * 5 = 2.4 * 2 * k - 2 * 3.6;

3.6 * k + 6 = 4.8 * k - 7.2;

3.6 * k - 4.8 * k = - 7.2 - 6;

-1.2 * k = - 13.2;

k = 13.2/1.2;

k = 11.