X=-39/5 and y=10 :) i hope this helps you out !
Answer:

Step-by-step explanation:
You can understand the statement from many perspectives, but in terms of proposition logic it is best to understand it as "negation of a" or " b" in mathematical terms is written like this

You can show that they are logically equivalent because they have the same truth table.
Here is the answer if you can't read my writing than just ask. also if you have any questions about how I got something feel free to ask