3. Jon ate too many holiday cookies and gained 9 pounds in December. Then he went on a diet and lost 4 pounds in
January. Then he lost another 7 pounds in February, Jon wants to know what the total change in his weight was over these
three months. Which of the following equations matches the situation above?
A -9+4+7
B 9+(-4) + (-7)
C. None of the above.