Question

Restriction on a variable in a denominator: linear
w-2 / w+7
w = ?

Answer 1

w≠-7

Explanation:

w-2

---------

w+7

The denominator cannot be zero, so

w+7 cannot be zero

w+7≠0

Subtract 7 from each side

w+7-7 ≠0-7

w≠-7