Which of the following is NOT equivalent to the rational expression: 4/3-x

a. - 4/x-3

b. - 4/x-3

c. - 4/3-x

We are given the rational expression 4/3-x and is asked to determine which of the choices is not equivalent to the given expression. Using the transitivity property, 3 - x is equal to - x + 3. When the negative sign is placed outside the term 3-x then, 4 should change also to - 4. Answer is C.