I think you mean in terms of
?
Recall Euler's identity

and de Moivre's theorem

where
.
It follows that

By the binomial theorem, expanding the right side gives

and so

We can factorize this as

and using the Pythagorean identity

this reduces to

Answer:
x = 17
Step-by-step explanation:
x + x + 8 = 42 because x = boys and x + 8 = girls
2x = 34 because 2x = 42 - 8
x = 17
i hope this helps! you don't need the 2x = 42 - 8 to be an equation ;)
I Think it is atomic mass