Answer:
Im not 100% sure on this, but i think its c or d. I'm leaning towards c.
Explanation:
If its in a certain order than most of the time you would be able to tell if the problem needs a solution. (I'm sorry I'm not the best at English.)
If people have tried to resolve it then obviously its gonna have a solution since others are already trying to solve it.
Answer:
The parts of an expression or equation being added or subtracted.
Explanation:
