Well.....Since you posted in an Excel group...

Try this:

B1: 1
B2: =B1/4-B1/5

From the Excel Main Menu:
<tools<goal seek
....Set cell: B2
....To Value: 8
....By Changing: B1
Click [OK]

Goal Seek will set cel B1 to: 160

Does that help?
--------------------------

Regards,

Ron
Microsoft MVP (Excel)
(XL2003, Win XP)




wrote in message
...
Please help solve this equation.

B/4 - B/5 = 8



Thanks