Answer:
All are incorrect
Step-by-step explanation:
Required
Determine which is correct or not

This is incorrect because:

---- fixed

This is incorrect because:


---- fixed

This is incorrect because:

---- fixed
Is the that the entire question?
90 is the answer to your question!
There's one unforgivable taboo that transcends just about every branch of mathematics, and that's dividing by zero. Division by zero is undefined, so any fraction with a zero in its denominator is by definition absurd. For what values of x would the denominators on either of those fractions be zero? Those will define the restrictions on your variable.