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126-[(63×2:6+109)×75:25+21:3)]÷10​

Răspuns :

Răspuns:

126-[(126:6+109)x75:25+21:3)]:10

=126-[(21+109)x75:25+21:3)]:10

=126-(130x75:25+21:3):10

=126-(9750:25+21:3):10

=126-(390+21:3):10

=126-(390+7):10

=126-397:10

=126-39 rest 7

=80