Identify which property is being illustrated.

x- 7= x -7
A. Reflexive Property
B. Symmetric Property
C. Transitive Property
D. Substitution Property

pls help

an = 22 + (n-1) *6

110 seats

step-by-step explanation:

an=a1+(n-1)(d)

a1 = 22   this is the first item in the sequence

d =6   this is how the sequence goes up

a)   an = 22 + (n-1) *6

b) a12 = 22 + (12-1) *6

    a12 = 22+11*6

  a12 = 22 +88

  a12 = 110

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any of them that add up to 180 degrees.