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afla numarul necunoscut:c×11=1331;d)d:7=1245rest4.

Răspuns :

c=1331:11
c=121

d=1245x7+4
d=8719
cx11=1331
c=1331:1
c=121
121x11=1331

d:7=1245 rest 4
d=1245x7+4
d=8715+4
d=8719