the answer is x=2 hope this helps :)
Answer:

Step-by-step explanation:
{90° = m∠1 + m∠2
{105° = 2m∠1 - m∠2
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All you have left to do is this:

So, your two angle measures are 
I am joyous to assist you anytime.
Use Pythagoras 6 squared =36-(4x4) =20 square root of 20 then times that by two
Four times a number is equal to negative eight.
Subtract 2 numbers then subtract it with 180 (sorry if you get it wrong)