How to find solution to system of equations

It helped me learn something I was totally confused on, and I can also get the answers within seconds, and now 5 years later it even have detail explanation! Great app, highly recommended. The teacher sucks, she has no idea how to teach. Sc honours with Mathematics.

There aren't many ads and every few equations you can see the steps if you watch a video which makes this very easy. Always has the right answers and helps me alot with tests, the step by step description is a little confusing at times, but once you familiarize yourself to it, you'll be good.