Question

The temperature at 10:00 was 10°F. This is 3°F warmer than the temperature at 8:00. Model and solve the equation X +3 = 10To find the temperature x in degrees Fahrenheit at 8:00.

Answer 1

First subtract 3 from both sides, since you want x to be by itself on one side only. We subtract by 3 on both sides because we have to do the same thing to the right as we do to the left and vice versa.
X + 3 = 10
-3 -3
X = 7

Your answer is 7°F at 8:00 with the model above.