Using mulit-vairable equations in SOLVE

https://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/articles.cgi?read=556

from https://www.hpmuseum.org/forum/thread-1212.html

So, can I write an equation in programming, such as

(I* R) - E = 0

(or however one should program it in)

and use SOLVE to find the unknown?

cf. TECHNIQUE: 'SOLVE' AND 'INTEG' WITH "MISO" USER FUNCTIONS ON THE 34C/15C/41C

Code:
LBL A
STO (i)
RCL 0
RCL* 1
RCL- 2
RTN

Example:
<I> STO 0
<E> STO 2
1 STO I
SOLVE A

— John Pumford-Green 02/08/22 11:50