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Resistive Voltage Divider Solve for R2 (or any variable)?

dB 1 :

Inputs:

V.in 12 V * :

Input voltage

R1 1.5 kΩ * :

Top voltage divider resistor (series)

R2 1.5 kΩ * :

Lower voltage divider resistor (shunt)

V.out 3.5 V * :

Output voltage

Formula:

V.out V.in R2 R1 R2 + / * :

Voltage divider formula

How do I solve for R?

20220408 Voltage Divider Solve.sm

END.

R2 Clear 1

V.out V.in R2 kΩ * R1 R2 kΩ * + / * ≡ R2 solve 0.6001 0.6176 21 mat

V.out V.in R2 kΩ * R1 R2 kΩ * + / * ≡ R2 roots 0.6176

V.out V.in R2 R1 R2 + / * ≡ R2 solve maple kΩ 0.6176

V.out V.in R2 R1 R2 + / * ≡ R2 1 kΩ * ≡ FindRoot kΩ 0.6176

R2 Clear 1

R2 1 kΩ * ≡ FindRoot

V.out V.in R2 R1 R2 + / * ≡

R2 617.6446 Ω *

R2 Clear 1

R2 equ V.out V.in R2 R1 R2 + / * - :

v f v 1 el kΩ * equ :

111 mat X f al_nleqsolve 0.6176 11 mat