Question

How do you simplify `(10-x)/(x-10)`?

Answer 1

`-1`

Explanation:

Start with the original:

`(10-x)/(x-10)`

See that the denominator and numerator are the same but for a difference in sign, so we can simplify by:

`(10-x)/(x-10)=-1((10-x)/(-1(x-10)))=-1((10-x)/(-x+10))=-1((10-x)/(10-x))=-1`