Question

Which equation is not equivalent to the formula m = ca?

Answer 1

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