grisuno

answer

$args = array(

			'post_type' => 'proyectos',
			'posts_per_page' => 10,
			'tax_query' => array(
				array(
					'taxonomy' => 'unidades_de_negocio',
					'field'    => 'id',
					'terms'    => $term_id,
				),
				array(
					'taxonomy' => 'categoria_proyectos',
					'field' => 'tag_ID',
					'terms' => $nCat
				)
			),
			'paged' => $paged
			);