When an alligator is born it is about 8 inches long each year they grow 12 inches determine the age

When an alligator is born it is about 8 inches long each year they grow 12 inches determine the age and years of 116 inch alligator?

Calculate inches to grow to get to 116
116 - 8 = 108

Now figure out how many years it takes growing at 12 inches per year, using y as years
12y = 108

Using our equation calculator, we get:
y = 9