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e. [(420: a) x 4+24]: 4 = 11


Răspuns :

Răspuns:

(420:a)×4+24=11×4

(420:a)×4+24 = 44

(420:a)×4 = 44 - 24

(420:a)×4 = 20

420:a = 20 : 4

420 : a = 5

a = 420 : 5

a = 84