Math & Science ⇒ Systems of equations

[kapowza]

I have three systems of equations that I'd like to display in a row as in question 1 in the pdf file that is attached.

Specifically, I'd like the systems of equations to be numbered and to appear in a row. Is there any easy way to do this? Thanks.

[stbeale]

I suppose you could make a six column table. Put (1),(2),(3) in columns 1, 3, and 5. Then put arrays with your equations in columns 2, 4, and 6.
or you could make it a 6x3 table if you want the (n)'s to line up at the top.

[gmedina]

Hi kapowza,

you could use a combination of minipage, align and split environmets:

Code: Select all

\documentclass{article}
\usepackage[leqno]{amsmath}

\begin{document}

\begin{minipage}{.3\textwidth}
\begin{align}
\begin{split}
  a &= b\\
  c &= d\\
  e &= f 
\end{split}
\end{align}
\end{minipage}
\begin{minipage}{.3\textwidth}
\begin{align}
\begin{split}
  g &= h\\
  i &= j\\
  k &= l 
\end{split}
\end{align}
\end{minipage}
\begin{minipage}{.3\textwidth}
\begin{align}
\begin{split}
  m &= n\\
  o &= p\\
  q &= r 
\end{split}
\end{align}
\end{minipage}

\end{document}

Edit: if you want to keep the tag position on the top line, then you could try something like the following:

Code: Select all

\documentclass{article}
\usepackage[leqno]{amsmath}

\begin{document}

\begin{minipage}{.3\textwidth}
\begin{align}
  a &= b\\
  c &= d\notag\\
  e &= f\notag
\end{align}
\end{minipage}
\begin{minipage}{.3\textwidth}
\begin{align}
  g &= h\\
  i &= j\notag\\
  k &= l\notag
\end{align}
\end{minipage}
\begin{minipage}{.3\textwidth}
\begin{align}
  m &= n\\
  o &= p\notag\\
  q &= r\notag
\end{align}
\end{minipage}

\end{document}