Hi Again Roseland;
Another great question! I appreciate it!
We need to perform a method called SUBSTITUTION. I will illustrate.
Let's begin with the first equation, because it is easiest.
Let's isolate for y...
Let's combine like terms...
Let's add x to both sides...
Let's subtract 14 from both sides...
Let's divide both sides by 4...
Let's check our results...
23 ??? 3(3)+14
23 ??? 9+14