问两道PREP数学

2道题目

1. A certain city with a population of 132000 is to be divided into 11 voting districts, and no district is to have a population that is more than 10 percent greater than the population of any other district, what is the minimum possible population that the least populated district could have?

答案是11000.求解过程！

2.

   +  X    Y      Z
   4  1   -5     m
   e  7    n    10
   f   2    -4     5
m+n=?

答案是5

第一题：

设人口最少的区的人数为X，其他10个区的人口more than 10%,则：

x+(x+0.1x)x10=132,000 

        x=11,000