Answer:
x=13.6
Step-by-step explanation:
These are vertical angles, so they are equal
8x+16 = 3x+84
Subtract 3x from each side
8x-3x+16 = 3x-3x+84
5x+16 = 84
Subtract 16 from each side
5x+16-16 = 84-16
5x = 68
Divide by 5
5x/5 =68/5
x = 13.6
