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[(58×a-80):25]×64=1280


VA ROG


Răspuns :

(58×a-80)=1280÷64
56×a=20+80
a=100÷56
a=1,7857
Sper ca te-am ajutat!
(58x a -80) : 25=1280:64
(58xa- 80) :25=20
58xa-80=20x25
58xa-80=500
58xa=500+80
58xa=580
a=580:58
a=10