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Calculati 2xa+2xb+2xc stiind ca a+b=215;a+c=302 si b+c=512.

Răspuns :

2*a+2*b+2*c=?
a+b=215
a+c=302
b+c=512

2*a + 2*b + 2*c= 215+302+512= 1029

coroana?