Solve for M
\left\{\begin{matrix}M=\frac{F}{a}\text{, }&a\neq 0\\M\in \mathrm{R}\text{, }&F=0\text{ and }a=0\end{matrix}\right.
Solve for F
F=Ma
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Ma=F
Swap sides so that all variable terms are on the left hand side.
aM=F
The equation is in standard form.
\frac{aM}{a}=\frac{F}{a}
Divide both sides by a.
M=\frac{F}{a}
Dividing by a undoes the multiplication by a.
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