16/4 could be reduced to 4
Answer:
15
Step-by-step explanation:
y is part of a right angle on line AB
a right angle = 90 degrees
90-47 = 43 degrees
y = 43 degrees
a straight line = 180 degrees
180-47 = 133 degrees
x = 133 degrees
9 + x = 17
17 - 9 = x
x = 8
