Question

1/3x+1/5x=22/155/6（x-1）=5/18简算：2003/2004÷1/2005

Answer 1

1/3x+1/5x=22/15

8/15x=22/15

x=11/4

x=2.75

5/6（x-1）=5/18

x-1=1/3

x=4/3

简算：

2003/2004÷1/2005

=(1-1/2004)×2005

=2005-2005/2004

=2003又2003/2004