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(68-c)÷9=7
(55-d)÷7=7


Răspuns :

Răspuns:

(68-c)÷9=7

(68-c)=7x9

68-c=63

c=68-63

c=5

(55-d)÷7=7

(55-d)=7x7

55-d=49

d=55-49

d=6