Solve for Q
\left\{\begin{matrix}Q=\frac{B}{hz+1}\text{, }&h=0\text{ or }z\neq -\frac{1}{h}\\Q\in \mathrm{R}\text{, }&B=0\text{ and }z=-\frac{1}{h}\text{ and }h\neq 0\end{matrix}\right.
Solve for B
B=Q\left(hz+1\right)
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Q+Qzh=B
Swap sides so that all variable terms are on the left hand side.
\left(1+zh\right)Q=B
Combine all terms containing Q.
\left(hz+1\right)Q=B
The equation is in standard form.
\frac{\left(hz+1\right)Q}{hz+1}=\frac{B}{hz+1}
Divide both sides by 1+zh.
Q=\frac{B}{hz+1}
Dividing by 1+zh undoes the multiplication by 1+zh.
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