How to stretch the page width

Hi my site is https://browadsaves.com
and I succesfully removed the sidebar from a page but I need to stretch the page so it will look nicer.
here’s my page template code:

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<?php get_header(); ?>
	<div class="<?php if (!is_page(7240)) : ?>myclass<?php else : ?>myclasswider<?php endif; ?>">}
		<?php if (have_posts()) : ?>
		<?php while (have_posts()) : the_post(); ?>
		<div class="posttop">
			<div class="postcomments"><?php comments_popup_link('0','1','%'); ?></div><!-- END postcomments -->
			<h2></a><a>"><?php the_title(); ?></a></h2>
			<div class="postinfo small">
				Posted on <?php the_time('F j, Y'); ?> ? <?php edit_post_link('(Edit)', '', ''); ?>
			</div><!-- END postinfo -->
		</div><!-- END posttop -->
	    <div class="postwrap">
			<?php the_content('read more'); ?>
	    </div><!-- END postwrap -->
		<div class="postbottom"></div><!-- END postbottom -->
		<?php endwhile; ?>
		<?php else : ?>
		<?php endif; ?>
	</div><!-- END contentwrap -->
 <?php if (is_page(7240)) : ?>
<?php else : ?>
<?php get_sidebar(); ?>
<?php endif; ?>
<?php get_footer(); ?>

thanks