How old is Mum?

来源:百度知道 编辑:UC知道 时间:2024/05/18 12:21:52
A.Mum,how old are you?
B.Last year's age pius this year's age is 59,How old am l?
A.Oh,you are( ).
()里面填数字!

30

X+(X+1)=59
X=29
x+1=30
今年30

30

last year is 29
this year 30
29 plus 30 equals to 59

所以空格里是30.

脑残,30,59-1=58,58一半=29,29+1=30

30

29+30=59

29+30=59所以今年30岁
加分吧