if n is an integer, which equation can be used to find three consecutive integers whose sum is -18.

skill: consecutive integers

(1) n+(n+1)+ (n+3)=-18

(2) n+(n+1) + (n +2) = -18

(3) n+ (n + 2) + (n +4)=-18

(4) n(n+2)+(n+3)=-18

the sum of three consecutive odd integers is 13 less than 4 times the middle number. find the three integers. only an algebraic solution can receive full credit.