Answer:
i think the 2nd one is correct .. i have not fluent in english to explain the answer.
X = A/y
You divide the y from both sides
The y on the right cancels
On the left you have A/y = x
Hey! since it’s a 5 sided shape it’s area will be 540° so you add up 108+100+90+120=418
the final angle is 122*
then since angles on a straight line is 180° you minus 122 from 180 and x= 58°