Keep going! Check out the next lesson and practice what you’re learning:
[ Ссылка ]
When we perform operations on a system of equations, some operations produce an equivalent system, while others don't necessarily produce an equivalent system. When we're solving a system of equations, we need to use operations that guarantee equivalence.
![](https://s2.save4k.ru/pic/0bBHepZ8UPE/maxresdefault.jpg)