7x-y=13 8x+y=-14 what is the answer?

So i am guessing that those are two different equations so for the equation:
-7x-y=13 your answer is . How is this?
Well you have to add y to both sides of the equation so it would look like this: and so when you add it up it will look like this: notice that the negitive y became a positive and went to the other side of the equation. So now what? well know you can divide by -7 so like this: so then once you do all of that your answer becomes:.

Now for your second equation and just look in the attachment it is explained in written from not text XD. Good Luck~!