X can be anything you want as long as it is not 1 or -7. If you have repeated x values with different y values, then it won't be a function.
I'd assume you're asking two - two, which is 0. If it's two + two, then it's four. I hope this helps!
Answer:
Step-by-step explanation:
what is the value of a in a/5 + 3= 8
a/5 + 3= 8
a/5 = 8 - 3
a/5 = 5
a = 5 * 5
a = 25