Question 551258
Hello, 
Maybe if you think of these numbers as temperatures then it might help you. 
-5+7+(-14)
It's minus 5 degrees and warms up 7 degrees then it would be 2 degrees above zero. But if it got 14 degrees colder then it would be minus 12 so the answer is 
-12
Make sense?
RJ 
www.math-unlock.com