 <translate> On the first day, Alina sent 120 - 20 = 100 messages. The total number for the first day is 100 + 120 = 220 messages. On the second day, Lucia sent 1 / 3 * 120 = 40 messages. Alina sent 100 * 2 = 200 messages on the second day. The total for the second day is 40 + 200 = 240 messages. For the three days, they sent 220 + 220 + 240 = 680 messages.
Thus, the answer is 680. <yor> Lọ́jọ́ àkọ́kọ́, Alina fi ọ̀ọ́dúnrún [120] ìsọfúnni ránṣẹ́ - ogún [20] = ọgọ́rùn-ún [100] ìsọfúnni. Àpapọ̀ iye fún ọjọ́ àkọ́kọ́ jẹ́ 100 + 120 = 220 ìsọfúnni. Lọ́jọ́ kejì, Lucia fi ọ̀rọ̀ ránṣẹ́, 1 / 3 * 120 = 40. Alina fi 100 * 2 = 200 ìsọfúnni ránṣẹ́ lọ́jọ́ kejì. Àpapọ̀ fún ọjọ́ kejì jẹ́ 40 + 200 = àwọn ìsọfúnni 240. Láàárín ọjọ́ mẹ́ta yẹn, wọ́n fi ọ̀rọ̀ ránṣẹ́ 220 + 220 + 240 = 680. Nítorí náà, ìdáhùn náà ni 680. 