B+t=? 7 класс

The expression "B + t = ?" appears to be incomplete as it stands, and without additional context or information, it's not possible to provide a definitive answer. Typically in algebra, letters are used to represent variables, and without knowing what B and t stand for or any further equations or values related to them, I can't solve for their sum.

However, if you meant to represent an equation where B and t are variables, and you are looking for the sum of them, then the answer is simply that the sum of B and t is expressed as "B + t." In algebra, when you don't know the specific values of variables, you often leave the expression in terms of those variables unless you have more information that allows you to solve for their actual values.

If you have additional context or information, such as the values of B and t or an equation they are part of, please provide that so I can assist you further.