Huimin New Village allocated a house to Xiaohui's family at a price of 1.2 million yuan. According to the requirements, it is required to pay 30 thousand in the first year, starting from the second year.
1、0.5+7.5x0.4%
=0.5+0.03
=0.53 (ten thousand yuan)
2、0.5+[9-0.5(n-2)]x0.4%
= 0.5+( 10-0.5n)x 0.4%(n & gt； 1)
Pay off the mortgage when 10-0.5n=0.5, the solution is: n= 19.