2у-у

To simplify the expression \(2y - y\), you can combine like terms.

Starting with the expression:

\[ 2y - y \]

You can think of \(2y\) as having 2 parts of \(y\) and \(y\) as 1 part of \(y\). Thus, when you subtract \(y\) from \(2y\), you are left with:

\[ 2y - 1y = (2 - 1)y = 1y \]

So, the simplified expression is:

\[ y \]