X = 112
See attachment file below.
Hope it helped!
When you have ratios and some unknowns you can create complex fractions from them.Bring them to the same denominator and solve for X.
Answer:

Step-by-step explanation:
we know that
---> by addition angle postulate
we have
----> given problem
----> given problem
substitute in the expression above

Divide by 2 both sides
