Final answer:
To simplify the expression 2x - x, subtract the coefficients of like terms to get x. There are no other like terms, so x is the simplest form of the given expression.
Step-by-step explanation:
The expression given is 2x−x. To combine like terms, we simply add or subtract the coefficients of like terms, and the like term here is 'x'. We have 2 'x's and we subtract 1 'x' from it, so 2x − x = x.
There are no other like terms to combine, so this is the simplest form of the expression. To check if the answer is reasonable, we confirm that the like terms have been correctly combined and that there are no further simplifications. Since 2 minus 1 is indeed 1, the simplified expression is reasonable.