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Cum se rezolva acest exercitiu? (100xd-110):39=10 URGENT VA ROG!

Răspuns :

(100×d-110):39=10
100×d-110=39×10=390
100×d=390+110=500
d=500:100=5
(100xd-110)=10x39
(100xd-110)=390
100xd=390+110
100xd=500
d=500:100
d=5
(100x5-110):39=
500-110=390:39=10
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