#### How to Solve System of Equations

```I have a series of data that I need to develop a linear relationshi
for.

A1*X+B1*Y=C1
A2*X+B2*Y=C2
A3*X+B3*Y=C3
....
....
....
AN*X+B3*Y=CN

AN, BN and CN are all known.  However, there does not exist an exac
solution for X and Y (this is from statistical data).

I'm just looking for an approximation for X and Y.  The data is ver
rough, and a linear relationship probably isn't the best fit (r-square
values of 0.226).  However, I need to figure out a way to force a fi
in there, regardless of how mess it is

--
Message posted from http://www.ExcelForum.com

```
 0
4/2/2004 5:09:24 AM
excel.misc 78881 articles. 5 followers.

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```=LINEST(C,AB_array)

Jerry

RichC < wrote:

> I have a series of data that I need to develop a linear relationship
> for.
>
> A1*X+B1*Y=C1
> A2*X+B2*Y=C2
> A3*X+B3*Y=C3
> ...
> ...
> ...
> AN*X+B3*Y=CN
>
> AN, BN and CN are all known.  However, there does not exist an exact
> solution for X and Y (this is from statistical data).
>
> I'm just looking for an approximation for X and Y.  The data is very
> rough, and a linear relationship probably isn't the best fit (r-squared
> values of 0.226).  However, I need to figure out a way to force a fit
> in there, regardless of how mess it is.

```
 0
4/2/2004 1:13:51 PM

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