From: Iriemon on 19 Apr 2010 11:59 I am trying to solve the following equation for "X": Sorry, Discussion group formatting will not allow me to write in superscript! The last part is supposed to be "X" raised to the 1.33 power. ..28 = 128.25(X 1.33) ..28 = 128.25 times "X" raised to the 1.33 power Must have forgot most of my algebra! :-( From: Tom Hutchins on 19 Apr 2010 13:22 Try using Goal Seek. Enter 128.25 in cell A1 Enter 1 in cell B1 In C1 enter =B1^1.33 in D1 enter =A1*C1 B1 is where X is located. Launch Goal Seek. In Excel 2007 select Data ribbon >> What-If Analysis >> Goal Seek. In earlier versions select Tools >> Goal Seek. Set it up like this: Set cell: D1 To value: 0.28 By changing cell: B1 Click OK. It finds a solution that it determines is close enough. If it's not close enough for you, copy A1:D1 down to row 2. In B2, enter something like =B1-0.00000001 Now copy A2:D2 down for about a thousand rows (make sure the value in column A doesn't automatically increment). Somewhere around row 800 you will find the closest match to exactly 0.28, unless you want to use more decimal places (and lots more rows). As you can see, the caret ^ is how you raise a number to a power in Excel. Hope this helps, Hutch "Iriemon" wrote: > I am trying to solve the following equation for "X": > > Sorry, Discussion group formatting will not allow me to write in superscript! > The last part is supposed to be "X" raised to the 1.33 power. > > .28 = 128.25(X 1.33) > > .28 = 128.25 times "X" raised to the 1.33 power > > Must have forgot most of my algebra! :-( > > From: Luke M on 19 Apr 2010 13:29 Divide, than find the 1.33rd root of the quotient. XL formula: =(.28/128.25)^(1/1.33) X = 0.009984 -- Best Regards, Luke M "Iriemon" wrote in message news:7F7CFDAF-197B-423B-AF7B-95A9EAD32BAC(a)microsoft.com...>I am trying to solve the following equation for "X": > > Sorry, Discussion group formatting will not allow me to write in > superscript! > The last part is supposed to be "X" raised to the 1.33 power. > > .28 = 128.25(X 1.33) > > .28 = 128.25 times "X" raised to the 1.33 power > > Must have forgot most of my algebra! :-( > >