[tex] \displaystyle\\
m = c \times a\\\\
\Longrightarrow
\begin{cases}
c = \dfrac{m}{a} \\\\
a = \dfrac{m}{c} \\\\
m = a\times c
\end{cases}\\\\
\Longrightarrow\text{Equation}\text{\bf "a equals c over m"}\text { is NOT equivalent to the formula m = ca} [/tex]
