How do you simplify $2x-6x$ ?

Hint: For answering this question we need to simplify the given expression $2x-6x$ . For that we need to use basic arithmetic simplifications like addition and transformations like shifting from right hand side to left hand side and reduce it.

Complete step-by-step solution:
Now considering from the question we have been asked to simplify the given expression $2x-6x$.
For doing that we need to use basic arithmetic simplifications like addition, subtraction, multiplication, division and transformations like shifting from right hand side to left hand side and vice-versa then we need to reduce it.
This type of questions is very simple and can be easily answered without performing much calculation and basically we should be sure with this type of questions and try to score maximum out of them.
Here if we observe the given expression is already arranged.
Now as we need the simplified expression we will perform the basic simple arithmetic subtraction after doing that we will have $\Rightarrow -4x$ .
Therefore we can conclude that the simplified expression obtained from the given equation $2x-6x$ is $-4x$.

Note: We should be sure with the simple arithmetic calculations we make to simplify the equations in questions of this type. This type of questions are very easy and do not require much calculations so the possibility of mistakes in questions of this type are very less. Similarly we can simplify any other expressions like for the expression ${{x}^{2}}-3{{x}^{2}}$ it will be given as $-2{{x}^{2}}$ .