What is the answer to this? i can not figure it out, and neither can my parents.

N=3/13

1) Simplify the right side first. -1/9 = 8/9 - 13n/3

2) Switch the sides so n is on the right (optional): 8/9-13n/3 = -1/9

3) Move all terms not containing n to the right of the equation. Do this by subtracting subtracting. -1/9 - 8/9 = -1

4) Multiply both sides of the equation by 3 to isolate the variable "n".
(3)-13n/3 = -1(3). The new equation is -13n = -1.

5) Divide each term by -13 and simplify. The final answer is n=3/13

What mathematical statement is missing ? ? the answer is b