Solve for m
\left\{\begin{matrix}m=\frac{n\left(V+3\right)}{t}\text{, }&t\neq 0\text{ and }n\neq 0\\m\in \mathrm{R}\text{, }&V=-3\text{ and }t=0\text{ and }n\neq 0\end{matrix}\right.
Solve for V
V=\frac{mt}{n}-3
n\neq 0
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Vn=mt+n\left(-3\right)
Multiply both sides of the equation by n.
mt+n\left(-3\right)=Vn
Swap sides so that all variable terms are on the left hand side.
mt=Vn-n\left(-3\right)
Subtract n\left(-3\right) from both sides.
mt=Vn+3n
Multiply -1 and -3 to get 3.
tm=Vn+3n
The equation is in standard form.
\frac{tm}{t}=\frac{n\left(V+3\right)}{t}
Divide both sides by t.
m=\frac{n\left(V+3\right)}{t}
Dividing by t undoes the multiplication by t.
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