Answer: 16.16 but i really am just making this up.
Step-by-step explanation:
if the triangle is worth 180 and two of the sides are equivalent, then the angle in the top right and the angle in the top left are equal.
3x + 11 = 5x + 1
2x = 12
x = 6
so the angle on the bottom left a.k.a: y, is 6 so
180-6 = 12x - 20
i think...
