Question

Which value is equivalent to x-7/7-x
A) -7
B) -1
C) 1
D) 7

Answer 1

The answer is B, because x-7/7-x will equal the negative version of the number on each end, which divided to -1.

Answer 2

(x-7)/(7-x) if you factor out -1 from the numerator you get:

-(7-x)/(7-x) which is equal to:

-1