12 * x = 88,8
x = 88,8 : 12
x = 7,4
Ответ: 7,4

Вычисления:
$\begin{array}{cc}\begin{array}{l}\underset{¯}{\phantom{0}}\mathrm{88,8}\\ \phantom{0}\underset{¯}{84}\\ \phantom{0}\underset{¯}{\phantom{0}}48\\ \phantom{00}\underset{¯}{48}\\ \phantom{000}0\end{array}& \begin{array}{l}\overline{)12}\\ \overline{\overline{)\mathrm{7,4}}}\end{array}\end{array}$

1,326 : x = 13
x = 1,326 : 13
x = 0,102
Ответ: 0,102

Вычисления:
$\begin{array}{cc}\begin{array}{l}\underset{¯}{\phantom{0}}\mathrm{1,326}\\ \phantom{0}\underset{¯}{13}\\ \phantom{00}\underset{¯}{\phantom{0}}2\\ \phantom{000}\underset{¯}{0}\\ \phantom{00}\underset{¯}{\phantom{0}}26\\ \phantom{000}\underset{¯}{26}\\ \phantom{0000}0\end{array}& \begin{array}{l}\overline{)13}\\ \overline{\overline{)\mathrm{0,102}}}\end{array}\end{array}$