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4169:65+c-1938 =670
|| c=


Răspuns :

4169:65+c-1938=670
64,138+c-1938=670
64,138+c=670+1938
64,138+c=2608
c=2608-64,138
c=2543,862
4169:65+c-1938=670
4169:65+c=670+1938=2608
64.139+c=2608
c=2608-64.139
c=2543.861