Question

Помогите решит уравнения

Answer 1

ПО свойству дробей, произведение крайних членов, равно произведению средних членов.
т.е.
a/b = c/d
a*d = b * c
отсюда
b = b * c / a

Answer 2

Solving Equations

Sure, I can help you solve equations. Could you please provide me with the specific equation you would like me to solve?