Question

4) 5(4(x - 1) - 3x) = 9x. Помогите решить​

Answer 1

Ответ:

5(4(x-1)-3x) = 9x

5(4x-4-3x) = 9x

5(x-4) = 9x

5x - 20 = 9x

-4x = 20

x = -5

Answer 2

Ответ:

5(4(x-1) - 3x) = 9x;

5(4(x-1) - 3x) - 9x = 0;

5(4x - 4 - 3x) - 9x = 0;

5(x-4) - 9x = 0;

5x - 9x = 20;

- 4x = 20;

4x = -20;

x = -5;