Hello from MrBillDoesMath!
Answer:
56
Discussion:
See attachment.
As angle "a" + 93 = 180 (straight line has 180 degrees)
a = 180 -93 - 87
But a triangle also has 180 degrees so
37 + x + 87 = 180 =>
x = 180 - 87 - 37 = 56
Thank you,
MrB
