Hi naeln,

You have to be careful when dividing by variables because you might accidentally REMOVE a potential solution to the equation.

Here's a simple example of that 'error':

How many solutions does the following equation have?

X^3 = X

Without too much trouble, you should realize that the solutions are...

If you divide both sides by X though, you get....

X^2 = 1

Now the solutions are....

-1 and 1. WHERE did the 0 go????? You divided it "out" when you divided both sides by X

.

Since each prompt requires that you properly deal with what you were given, you are responsible to find ALL of the potential answers. If you're thinking about dividing by a variable, then you might instead try factoring the equation first.

GMAT assassins aren't born, they're made,

Rich

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Rich Cohen

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