4,44/111=8,76(111+18x)

$${\frac{{\mathtt{4.44}}}{{\mathtt{111}}}} = {\mathtt{8.76}}{\mathtt{\,\times\,}}\left({\mathtt{111}}{\mathtt{\,\small\textbf+\,}}{\mathtt{18}}{\mathtt{\,\times\,}}{\mathtt{x}}\right)$$

0.04 = 157.68x + 972.36

-157.68x = 972.32        =>   x = -6.16641