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a+b+c=960;
a+b=53;
b+c=74


Răspuns :

a+b=530 !!!!!!!!

b+c =74 0 !!!!!!!!!

530+c =960

c =960-530 =430

b+c =740

b +430=740

b =740-430 =310

a+310 =530

a=530-310 =220