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afla numarul necunoscut : (56 :a+16):5+12=16

Răspuns :

(56:a+16):5+12=16
(56:a+16):5=16-12
56:a+16=4x5
56:a=20-16
a=56:4
a=14
(56:a+16):5+12=16
(56:a+16):5=16-12
56:a+16=4x5
56:a+16=20
56:a=20-16
56:a=4
a=56:4=14