# Can Mathematica help to rearrange an equation?

I have an equation which I want to rearrange so one variable is on the left side by itself.

Normally, I would do this with basic algebra and identities.

However, is it possible to use Mathematica to do this for me, automatically?

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 Hello Gravitas, and welcome to Mathematica.SE. Thanks for the Accept. – Mr.Wizard♦ Aug 21 '12 at 8:30

## migrated from quant.stackexchange.comAug 18 '12 at 17:08

The commonly used functions used are Solve and Reduce:
Reduce[x^2 + a x + 1 == 0, a]

x != 0 && a == (-1 - x^2)/x