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a x 9 = 1233
b : 8 = 247
843 : c = 3
d : 4 =115 rest 3
87 : e = 21 rest 3
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Răspuns :

Răspuns:

9a=1233

a=1233:9

a=137

b=8×247

b=1976

c=843:3

c=281

d=115×4+3

d=460+3=463

e=(87-3):21

e=84:21

e=4