Question

4: (12-x)=4:3 помогите срочно ​

Answer 1

Ответ:

$4 \div (12 - x) = 4 \div 3 \\ (12 - x) \times 4 = 4 \times 3 \\ 48 - 4x = 12 \\ 48 - 12 = 4x \\ 36 = 4x \\ x = \frac{36}{4} \\ x = 9$