Question

А=200=200+400 уровнение

Answer 1

A=200+400
a=600
Отвте: а=600.
 или
a=200=220+400
a=200≠600

Answer 2

200+400=600 
наверно 
я хз

Answer 3

It seems there is a misunderstanding or a typo in the equation you provided. The equation "А=200=200+400" is not a valid mathematical expression because the equal sign (=) is used to show equality between two expressions or values.

If you meant to write a mathematical equation, it should follow the standard format like this:

A = 200 + 400

In this equation, "A" is a variable, and it is being assigned the value of the sum of 200 and 400. The solution to this equation would be:

A = 600

If you have a different equation or need further clarification, please provide the correct equation or more information, and I'll be glad to assist you.