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a fost răspuns

D+S=50
D+M=58
S+M=56
A=? D=? S=?


Răspuns :

2(D+S+M)=50+58+56
2(D+S+M)=164
D+S+M=82
D+S=50
50+M=82
M=82-50
M=32
D+M=58
D+32=58
D=58-32
D=26
D+S=50
26+S=50
S=50-26
S=24

coroana?
102533
D+S=50
D+M=58
S+M=56
2D + (S+M) = 50 + 58
2D + 56 = 108
2D = 108 - 56 = 52 => D = 52 : 2 = 26
D+S=50 <=> 26 + S = 50 => S = 50 - 26 = 24
D+M = 58  <=> 26 + M= 58 => M = 58-26 = 32
Verificare: S+M = 24 + 32 = 56 ; corect 
D = 26 ; S = 24 ; M = 32

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