How to decrease page loading speed in Wordpress website?

Wordpress is seo friendly site, so i installed a lot of plugins, then it's influence the webpage loading speed. So i removed un-used plugins and deleted empty tables in the database. A little bit speed increased. But how to get normal stage and how to improve website's page loading speed? Images is one... show more Wordpress is seo friendly site, so i installed a lot of plugins, then it's influence the webpage loading speed. So i removed un-used plugins and deleted empty tables in the database. A little bit speed increased.

But how to get normal stage and how to improve website's page loading speed?
Images is one of the biggest problems.
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