It would be a number that’s split into 3 equal parts for the pairs to make sense for example 30
Answer:

Step-by-step explanation:
Let the number be x.
Translating the word problem into an algebraic equation, we have;
Opening the bracket, we have;

Collecting like terms, we have;

Answer: 7 units
Step-by-step explanation:
Just plot the numbers, then count the distance between them