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428-(147+275-54:a)+369-107=274​

Răspuns :

Răspuns:

Salut

428-(147+275-54:a)+369-107=274

428-422+54/a+369-107=274

268+54/a=274

54/a=274-268

54/a=6

54=6a

6a=54

a=9.

==evergreen==