Given the position of the number A.B.C on the number axis Moreover, the distance from B. C to the origin is equal, and | A-B | - | - a | - | B + C is simplified| Picture | - | - - | - | - | - | - | - → a b 0 c

Given the position of the number A.B.C on the number axis Moreover, the distance from B. C to the origin is equal, and | A-B | - | - a | - | B + C is simplified| Picture | - | - - | - | - | - | - | - → a b 0 c

|a-b|-|-a|-|b+c|
= b-a+a-0
=b