If then and so .
We know that cannot be such a number which makes this true - thus we will look at all other numbers to solve this.
Divide by to get .
Case 1: Both . This means that this combines into just saying .
Case 2: Both . This means that this combines into just saying .
This gives us an answer that .
But that is not quite right because remember we said . Thus we need to take that point out of this solution set. Thus, the correct answer is .