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## Re: Solve Simple Relationship

**From**: |
José Abílio Matos |

**Subject**: |
Re: Solve Simple Relationship |

**Date**: |
Fri, 27 Aug 2021 22:17:04 +0100 |

On Friday, 27 August 2021 16.09.33 WEST Thomas D. Dean wrote:
>* I have a voltage divider I want to calibrate. I tried this by exchanging*
>* the resistors and measuring the resultant rfesistance.*
>* *
>* 1.6516 = 3.3 * R1 / (R1 + R2)*
>* 1.6484 = 3.3 * R2 / (R1 + R2)*
>* *
>* R1 is around 1005 ohms*
>* R2 is around 1003 ohms*
>* *
>* I think this is simple. But evidently, it is beyond me.*
>* *
>* Tom Dean*
As others said your equations are the same, that is
1.6516 = 3.3 * R1 / (R1 + R2) <=> 1.6484 = 3.3 * R2 / (R1 + R2)
So you do not have 2 but just 1 equation.
Note that 1.6516 + 1.6484 = 3.3.
So you really need another equation to resolve this problem. :-)
--
José Matos