※ 引述《a2515125 (Bobshih)》之銘言：
: 164 PS. Law firm has branches in X,Y andZ states.
: Each Lawyer has either a license in one state or in all three states
: . there are 10, 11, 13 lawyers licensed in the 3 states respectively.
: there are 28 lawyers in total in the firm. how many lawyers work in state Z?
: 设in all three states的人数是X，
: 10-x+11-x+13-x=28-x 算出x=3，那么只在Z的就是13-3=10
: 請問這題10-x+11-x+13-x 代表什麼意思
: 28-x 的意思是指除了3個地方都有註冊以外 ＸＹＺ地方分別的人數嗎
: 不太懂
: 麻煩了
我是這樣理解的
設有x人只註冊一個地方 有28-x人三個地方都有註冊
10+11+13=34=3(28-x)+x X=25 ....表有三人是三個地方都有註冊
問只註冊Z的員工有多少? 就是13-3=10
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