1. The question is whether $x$ can be 0 in the context of the problem you are considering. 2. To determine if $x=0$ is valid, we need to check the conditions or domain restrictions of the problem. 3. For example, if the problem involves division by $x$, then $x=0$ is not allowed because division by zero is undefined. 4. If the problem involves expressions like $\sqrt{x}$, then $x$ must be greater than or equal to 0, so $x=0$ is allowed. 5. Without the specific problem, the general rule is: check if substituting $x=0$ causes any undefined operations like division by zero or taking the logarithm of zero or a negative number. 6. If no such restrictions exist, then yes, $x$ can be 0. Final answer: $x$ can be 0 only if it does not cause undefined operations in the problem.