A certain kind of animal weighs about 77 pounds at birth and gains 2 pounds per day for the first few weeks. Determine those days for which the animal's weight is more than 129 pounds.

The animal's weight is more than 129 pounds when the animal is more blank days old.

77 + 2n > 129

Solve for n

To determine the number of days for which the animal's weight is more than 129 pounds, we can set up an equation using the given information.

Let's assume the number of days the animal is old is represented by "d". We know that the animal weighs 77 pounds at birth and gains 2 pounds per day for the first few weeks.

The weight of the animal after "d" days can be represented by the equation: 77 + 2d > 129.

To solve for "d", we need to isolate it on one side of the equation. Let's start by subtracting 77 from both sides of the equation:
77 + 2d - 77 > 129 - 77

Simplifying the equation, we get:
2d > 52

Next, we need to isolate "d" by dividing both sides of the equation by 2:
2d/2 > 52/2

Simplifying further, we have:
d > 26

Therefore, the animal's weight is more than 129 pounds when the animal is more than 26 days old.