x+10y =3
4x+5y=5

What do you think?

x-5y=-4
-x-6y=4

yapjoel, don't post your question as an answer to another's post. Please start your own thread. And ditto what ISneezeFunny said. Make an attempt or at least ask a specific question about what you don't understand:

https://www.askmehelpdesk.com/arts-literature/announcement-font-color-ff0000-u-b-read-first-expectations-homework-help-board-b-u-font.html