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Află nr necunoscut
e:21=3 rest 4
(f-2):13=4




Răspuns :

e=(21•3)+4 =63+4=67
f-2=13•4
f-2=62
f=62-2=60
e:21=3 rest 4
e=21*3+4
e=63+4
e=67
V: 67:21 =3 rest 4

(f-2):13=4
=f-2=4*13
= f-2=52
f= 52+2
f= 54
V: (54-2) :13=
=52:13
=4

Sper ca am ajutat !