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Afla nr a,b,c daca a+b+c=693,a+b=587,b+c=418.a= ....b=………c=.....

Răspuns :

c=693-587=106

b=418-106=312

a=587-312=275


a+b+c=693
a+b=587
b+c=418
587+c=693
c=693-587
c=106
b+106=418
b=418-106
b=312
a+312=587
a=587-312
a=275