preambula

\documentclass[12pt,a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage[T2A,T1]{fontenc}
\usepackage[english,russian]{babel}
\usepackage[left=25mm, top=20mm, right=25mm, bottom=30mm]{geometry}
% Configuración
\usepackage{microtype}
\input{config.tex}
\usepackage{graphicx, wrapfig, subcaption, setspace, booktabs}
%\usepackage[scaled]{helvet}     % Fuente del documento
%\renewcommand{\familydefault}{\sfdefault}
\usepackage{url, lipsum}
\usepackage{tabularx}