This is a free online graphing calculator. You can type the equation just like you see it, and it'll graph it for you. This one will show you the points of intersection really easily.
This is a free online equation solver. You can just type in the equation just like you see it, and it'll solve it for you. There's even an option for you to see the steps on how to solve it.
https://www.mathpapa.com/equation-solver/
This is a free general math resource website. Want to look up a math definition? It's there (under glossary). Want to know answers to some math questions? They're there. It's an all in one math website.
http://mathcentral.uregina.ca/index.php
This is a free System of Equations Solver. It'll even show you step by step how to solve the system of equations after you type it in. Very good stuff.
https://www.symbolab.com/solver/system-of-equations-calculator