Question

решите уравнение -8х-х=4х+13

Answer 1

- 8x - x = 4x + 13
- 9x = 4x + 13
- 9x - 4x = 13
- 13x = 13
x = 13 : -13
Ответ: -1

Answer 2

-9x=4x+13
-9x-4x=(4x-4x)+13
-13x=(4x-4x)+13
-13x=13
x=-1