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a) 300 - b x 8 - 109 = 47
b) (48 x c + 216) : 40 = 27

Ajutor va rog frumos dau coroana.


Răspuns :

300-109-47=b×8

191-47=b×8

144=b×8

B=144:8

B=18

(48×c×216):40=27

(48×c×216)=27×40

(48×c×216)=1080

48×c=1080:216

48×c=5

C=5/48