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Afla a,b,c daca. a+b+c=960. a+b=53. b+c=74

Răspuns :

a + b + c = 960
a + b = 53
53 + c = 960
c = 960 - 53
c = 907
b + c = 74
a + 74 = 960
a = 960 - 74
a = 886
886 + b + 907 = 960
b = 960 - 907 - 886
b = - 833