A. B.c.m are rational numbers, and a-2b + C-M = 0, - A + b-2c = - m, then B and C () 1. Are opposite numbers to each other, 2 reciprocal numbers to each other, 3 reciprocal numbers to each other equal

A. B.c.m are rational numbers, and a-2b + C-M = 0, - A + b-2c = - m, then B and C () 1. Are opposite numbers to each other, 2 reciprocal numbers to each other, 3 reciprocal numbers to each other equal

A-2B+C-M=0
-A+B-2C=-M
The sum of the two formulas is as follows:
-B-C=0
B=-C
Opposite numbers