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Afla numarul necunoscut:
57:a=6rest3
Va rog dau coroana


Răspuns :

57:a=6 rest 3
a=(57-3):6
a=54:6
a=9
V: 57:9=6 rest 3
57:a=6r3
57=6a+3=>57-3=6a=>54=6a=>a=54:6=>a=9