Final answer:
To form a negative sentence in the present simple tense for 'My school workers do the homework on time', the correct construction would be 'My school workers do not (don't) do the homework on time.' However, there seems to be a misunderstanding as typically, students do homework, not school workers.
Step-by-step explanation:
The subject of the question appears to be surrounding the formation of negative sentences in the present simple tense. Specifically, the student is looking for the correct negative form of a sentence where the subject is 'My school workers', and the verb is 'do'. In the present simple negative form, the sentence would be 'My school workers do not (don't) do the homework on time.'
However, it's worth noting that the expression 'school workers' doing homework may be conceptually incorrect as students typically do homework, not school workers. It could be a typo or misunderstanding in the sentence construction. If we assume the subject was intended to be 'students' instead, then the corrected sentence would read 'My school students do not (don't) do the homework on time.'
Regarding the second part of the question, if we want to define X as the number of students who do their homework on time, we can treat X as a variable in a statistical or mathematical context representing that specific quantity.