subtracting inequalities

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Jinglander: Senior | Next Rank: 100 Posts; Posts: 58; Joined: Thu Jul 22, 2010 5:40 pm; Thanked: 1 times

by Jinglander » Thu Aug 12, 2010 10:13 am

MGMAT says never to do it. WHY

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Source: Beat The GMAT — Quantitative Reasoning | Thu Aug 12, 2010 10:13 am

Tani: Legendary Member; Posts: 1255; Joined: Fri Nov 07, 2008 2:08 pmFollowed by: 90 members; Location: St. Louis; Thanked: 312 times

by Tani » Thu Aug 12, 2010 10:35 am

Your comment is out of context. I would need to see what they are saying exactly. There are ways to handle inequalities, but they result in several options. Can you give me an example of a problem where they are saying that?

Tani Wolff

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Jinglander: Senior | Next Rank: 100 Posts; Posts: 58; Joined: Thu Jul 22, 2010 5:40 pm; Thanked: 1 times

by Jinglander » Thu Aug 12, 2010 12:10 pm

Honestly they just said don't do it. No subtracting them or dividing. Motions only if u know the signs. Adding is always ok. Perhaps you could explain when they can and cannot be subtracted or divided

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