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One of the more challenging GMAT algebra questions from the GMAT Official Guide 2020 is question #207. My students often ask me about it so my guess is that you could use some help with it, too.

Here is a video answer explanation breaking it down for you step-by-step. In it I take a non-standard approach, which I think you’ll find to be easier, faster, and more effective than the traditional algebraic solution presented in the book. You can use this technique to solve similar questions in the future.

If you want more solutions like this for every question in the GMAT Official Guide 2020, register for one of our comprehensive GMAT prep courses that includes them. Enjoy!