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a+b+c=432
a+b=218
a+c=307

a=? b=? c=?


Răspuns :

c=432-218
c=214

b=432-307
b=125

a=432-(214+125)
a=432-339
a=93
432-218=214(c)
432-307=125(b)
214+125=339(b+c)
432-339=93(a)