Okay so I think I know that x and/or y has to be negative.

But I dont know where to start from.

An ordered pair of real numbers (x,y) satisfies the equation $\displaystyle y$ = 4$\displaystyle x$ - 20 but does not satisfy the equation $\displaystyle y$/($\displaystyle x$-5) = 4. In the ordered pair, the value of x = y is:

a) 5 b)4 c) 20 d) 0 e) 24

help please ?