Question

C+M=42
C+F =54
F+M=40
C+M+F=?

F=?C=?M=?
Ma ajutati va rog

Answer 1

C + M=42 
C + F =54
F + M=40
__________________
2 x ( C + M + F) = 42 + 54 + 40 
C + M + F = 136 : 2 
C + M + F = 68 

68 - 42 = 26 ( F)

54 - 26 = 28 ( C) 

42 - 28 = 14 (M) 

Verific:  28 + 14 = 42
             28 + 26 = 54 
             26 + 14 = 40