he temperature at the end of the day was 80 degrees. The temperature had increased twice during the day, once of 8 degrees and another time by 4 degrees.

What was the temperature at the start of the day?

Let's assume the starting temperature of the day as "x" degrees.

The temperature increased by 8 degrees, so after the first increase, it becomes x + 8 degrees.
After the second increase of 4 degrees, the temperature becomes (x + 8) + 4 = x + 12 degrees.

Finally, at the end of the day, the temperature was 80 degrees, so x + 12 = 80 degrees.

Subtracting 12 from both sides of the equation gives us x = 80 - 12 = 68 degrees.

Therefore, the temperature at the start of the day was 68 degrees.

Let's assume the temperature at the start of the day is represented by "x" degrees Celsius.

According to the information given, the temperature increased twice during the day. The first increase was by 8 degrees and the second increase was by 4 degrees.

Therefore, the temperature after the first increase would be (x + 8) degrees Celsius.
And the temperature after the second increase would be ((x + 8) + 4) degrees Celsius.

Finally, we are told that the temperature at the end of the day was 80 degrees Celsius. So we can set up the equation:

((x + 8) + 4) = 80

Simplifying the equation, we get:
x + 12 = 80

Subtracting 12 from both sides of the equation:
x = 68

Therefore, the temperature at the start of the day was 68 degrees Celsius.

To find the temperature at the start of the day, we need to work backwards from the given information.

Let's assume the temperature at the start of the day was x degrees.

According to the information given, the temperature increased twice during the day. The first increase was by 8 degrees, and the second increase was by 4 degrees.

Therefore, at the end of the day, the temperature was x + 8 + 4 = x + 12 degrees.

Given that the temperature at the end of the day was 80 degrees, we can equate the above expression to 80:

x + 12 = 80

Now, we can solve for x by subtracting 12 from both sides of the equation:

x = 80 - 12

x = 68

So, the temperature at the start of the day was 68 degrees.