Using equity in 1 house to buy diff. house

[Jeff Fairchild]

Isn't there a way to use the equity in a different house, like when you buy a property from the homeowner subject to for example and you also need to give them a $20,000 loan. Most people would secure that loan to that property and when they fix up and sell it in 6 months, they would need to pay off that loan. But, if you give them a $20,000 loan secured by this other house, then you don't need to pay it off when you sell that house you're buying, right?