5. 12 After the Wenchuan earthquake, a large number of tents were urgently needed in the disaster area. A garment factory used to have 4 garment production lines and 5 children's wear production lines. The factory decided to switch production and planned to build 1000 tents in three days to support the disaster area. If 1 garment production line and 2 children's clothing production lines are enabled, 105 tents can be produced in one day. If two clothing production lines and three children's clothing production lines are activated, you can produce 178 tents a day.