The answer process is as follows:

Because when you were born, your mother was 26.

You are 77 years old, and your mother's age this year is: 26+7=33 years old.

So mom is 33 years old this year.

Extended data:

The key to solving the problem of "age"

Taking two numbers whose difference is a certain value as a condition in the problem, this application problem is called "age problem".

The problem of age is similar to the problems of sum and difference, sum multiple and difference multiple. The main feature is that age increases with time, but the difference between two different ages will not change. So the problem of age is a "constant difference" problem. Make good use of the characteristics of constant difference when solving problems.