$$-7/6+7/6is = to$$
$\left\{\begin{matrix}o=\frac{7\left(is-1\right)}{6t}\text{, }&t\neq 0\\o\in \mathrm{C}\text{, }&s=-i\text{ and }t=0\end{matrix}\right.$
$$-\frac{7}{6}+\frac{7}{6}is=to$$
$$to=-\frac{7}{6}+\frac{7}{6}is$$
$$to=\frac{7is-7}{6}$$
$$\frac{to}{t}=\frac{7is-7}{6t}$$
$$o=\frac{7is-7}{6t}$$
$$o=\frac{7\left(is-1\right)}{6t}$$
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$s=-\frac{6iot}{7}-i$
$$\frac{7}{6}is=to+\frac{7}{6}$$
$$\frac{7}{6}is=ot+\frac{7}{6}$$
$$\frac{\frac{7}{6}is}{\frac{7}{6}i}=\frac{ot+\frac{7}{6}}{\frac{7}{6}i}$$
$$s=\frac{ot+\frac{7}{6}}{\frac{7}{6}i}$$
$$s=-\frac{6iot}{7}-i$$
