Answer:
X is equalled to '' - 2''
Step-by-step explanation:
If you need an explanation, leave a comment ;) As my hand writing is very messy. I'll write it here if you want.
Cheers! :)
Magnesium chloride (MgCl2)
Answer:

Step-by-step explanation:

All angles add up to the same degree
We could answer this if we were able to see the other questions. ;-;