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?

1 answer

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.