If the fourth power of (x + 2) and the absolute value of 4-y are opposite to each other, then what is the Y power of X?

If the fourth power of (x + 2) and the absolute value of 4-y are opposite to each other, then what is the Y power of X?

The absolute value of 4-y is nonnegative
The fourth power of X + 2 is nonnegative,
So only when 4-y = 0 and the fourth power of X + 2 = 0, the two formulas are equal
The solution is y = 4, x = 2
The answer is 2 to the fourth power = 16