Question

Помогите пожалуйста
​

Answer 1

$9x = x + 12 \\ 9x - x = 12 \\ 8x = 12 \\ x = \frac{12}{8} \Rightarrow\frac{3}{2} \Rightarrow1 \frac{1}{2}$

Answer 2

9х = х + 12

9х - х = 12

8х = 12

х = 12 : 8

х = 1,5