## Algebra 1

$-1/(w-4)$; w cannot equal 4
In order to simplify, we want something to be both in the numerator and the denominator of the fraction so it can be canceled out. Thus, we factor and obtain: $(-1)(w-4)/(w-4)(w-4) \\\\ -1/(w-4)$ w cannot equal 4, for if w equaled 4, the denominator of the original fraction would cancel out to 0, which is not allowed.