You can put this solution on YOUR website! FIRST PART:
Let the angle be .
Then, its supplement =
Its complement = ; twice the complement =
By problem,
or
or x = 10
Ans: The reqd. angle is 10 degrees.
SECOND PART:
Let the numbers be (n-2), (n-1), n, (n+1) and (n+2).
Their sum = (n-2) + (n-1) + n + (n+1) + (n+2) = 5n = 0 (given)
So n = 0.