Hi!
X is part of a straight angle, which should add up to 180°.
So first we need to figure out what the other side of this straight angle is. Since the other side is inside the triangle, it should be easy.
All angles in any triangle always add up to exactly 180°. To figure out what the last angle is in the triangle, we just need to add the two existing angle measurements together and subtract the sum from 180.
97 + 30 = 127
180 - 127 = 53
So the last angle in the triangle is 53°.
Now, we can figure out the value of x. Since x is part of a 180° straight angle, and we know that half of said angle is 53°, we can find x by subtracting 53 from 180.
180 - 53 = 127
x = 127
Hope this helps :)
