So on number 2 u can put 7x-3 equals -21
and on number 3 u can put that you need to subtract the 7 from both sides so thats where you get -3 on the left side and on number 4 you can put that you need to divide by negative 3 to get the answer which is 7
The answer is C! Annuity means "a fixed sum of money paid to someone each year", which is similar to what the letter C is suggesting.
1/3n - 8 = -13 Is your equation
Your answer to the equation is
-13-8 = -21 times 1/3 is -13.86
N= -13.86