Х+2х

The expression "х+2х" can be simplified by combining like terms.

The coefficient of "х" in the first term is 1, and the coefficient of "х" in the second term is 2.

To combine the terms, we add the coefficients together:

1х + 2х = (1 + 2)х = 3х

So the simplified form of "х+2х" is 3х.