Please I need help with this math problem I don’t get it.

Answer:
-7 increased by 7 (-7+7=0)
7 decreased by 7 (7-7=0)
Step-by-step explanation:
The others were wrong, I showed what they added up to.
7+0=7
7-0=7
-7-7=-14
Answer:
-7 increased by 7
7 decreased by 7
Step-by-step explanation:
7 increased by 7
-7+7=0
7 decreased by 7
7-7=0