find the unknown term 8 , 86 , x , - 4 , - 12
8 , 86 , x , - 4 , - 12 i guess each differ in d range of 2 8 - 8 = 0 8 - 6 = 2 6 - 2 = 4 2 - 6 = - 4 - 4 - 8 = - 12 answer : a
subtract(divide(12, 4), const_1)