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I have a system of equations and would like the alignment to be done on the equal sign.

 phi_{t+1}  =  F\xi_{t}  
 y_t        =  A'X_t
 \theta_t   = \mu + \epsilon_t

What is the most standard way to have this with LyX ? Do I need to install additional packages ?

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1 Answer 1

up vote 7 down vote accepted

Insert → Math → Ams Align Environment

and then in the left part y_t and the right = A'X_t, then hit ctrl-enter to get a new line.

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