Which step have I done incorrectly?

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- July 14th 2012, 01:52 PMdaigoHow to simplify algebraic expression

Which step have I done incorrectly? - July 14th 2012, 02:37 PMSorobanRe: How to simplify algebraic expression
Hello, daigo!

Your answer is correct.

You made a few unnecessary steps, though.

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