I'm trying to rescale my to long equation in align + split environment (to get only one numbering). I found a method from here which is pretty useful.
However, the numbering is altered and is indicated below the equations instead of at the right. I guess it's due to the \parbox
command but I don't know how to fix it.
Here is a MWE, with a long equation:
\documentclass{article}
\usepackage{graphicx}
\usepackage{amsmath}
\begin{document}
\scalebox{0.8}{\parbox{.5\linewidth}{%
\begin{align}
\begin{split}
C_{M,i}(x) = &-\frac{e^{\text{Ha}_{i} - x \, \frac{k}{D_{\text{NO},t}}}\left(\left(-1 + e^{\text{H\~{a}}_{i}}\right)\left(-1+\text{Mu}_{i}+e^{\text{H\~{a}}_{i}}(1+\text{Mu}_{i})\right) \, Pr + 2 \, e^{\text{H\~{a}}_{i}} \, k \, \lambda_{\text{air},i} \, C_{i}(t,z) \right)}{2 \, k \left(-1 + \text{Mu}_{i} + e^{2 \, (\text{Ha}_{i}+\text{H\~{a}}_{i})}(1+\text{Mu}_{i})\right)} \\
&+\frac{e^{\text{Ha}_{i} + x \, \frac{k}{D_{\text{NO},t}}}\left(\left(-1+e^{\text{H\~{a}}_{i}}\right)\left(-1+\text{Mu}_{i} + e^{\text{H\~{a}}_{i}}(1+\text{Mu}_{i})\right) \, Pr + 2 \, e^{\text{H\~{a}}_{i}} \, k \, \lambda_{\text{air},i} \, C_{i}(t,z)\right)}{2 \, k \, \left(-1+\text{Mu}_{i} + e^{2(\text{Ha}_{i} + \text{H\~{a}}_{i})}(1+\text{Mu}_{i})\right)}
\end{split}
\end{align}
}}
\end{document}
Best Answer
If you really want to scale the equations, do it properly:
I removed all
\left
and\right
; also all\,
commands (they were wrong). I only used\bigl(
and\bigr)
in the outermost parentheses of the big expressions.Don't use
\text
, but\mathrm
in this context.