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afla numarul necunoscut: a:6=135 147:a 7 a*b=126 8*b=816 c:8=14rest 6 c:2=102rest 1

Răspuns :

a:6=135
a=135x6
a=810

147:a=7
a=147:7
a=21

8xb=816
b=816:8
b=102

c:8=14rest 6
c=14x8+6
c=118

c:2=102 rest 1
c=102x2+1
c=205