I want to merge two Laravel projects

I was making a website that has two parts. The first one is social media part and the second one is a core generator part. I made both of them separate Laravel projects. Now I want to merge them as one project. First part runs on PHP 5 and Laravel 5.4 and the second part runs on PHP 7 and Laravel 5.5

I don't understand how to do it.

via Chebli Mohamed