The image is really unclear but I will assume that the number of teams given = 66
and the formula is

plug in the number of teams

multiply both sides by two

subtract 132 from both sides and factor
t = 12
This is the answer that i was going to upload :
the answer is +5(or)-5 because of root
Answer: adjoining HAVE A GREAT DAY
Answer:
y=2x-14
Step-by-step explanation:
Gradient as m(for 1st line m1 and m2 for 2nd line)
m1/m2=-1
m1=(-1)*(-2)=2
y-(-2)/x-6=2
y+2/x-6=2
y+2=2x-12
y=2x-14