Use text mode brackets in math mode

Question

I would like to have the same style of brackets in the text mode and the math mode. I use the mathptmx package for the font (Please do tell if there's a better substitute for Times).

As seen from the image, the pair of brackets in ......(2) is in text mode, while those in (2) - (1) are in math mode. I would like to type all brackets in text mode.

Is there a way to force latex to use the text style brackets in math mode without having to type \text{(} every time?

\documentclass{article}
\usepackage{amsmath,mathptmx}

\begin{document}

$9m+n=41$ ......(2)
\begin{align*}
(2) - (1): \quad 8m&=40\\
m&=5
\end{align*}

\end{document}