How to use algebraic formulas in Python?

Question

how can I use formula to do algebraic calculations in Python
tn=a+(n-1)*d

tn=last term,
a=first term,
n=nth term of an Ap,
d=difference.
this is general term of arithmetic progression of class 10th in India...

how can use it to perform various calculations in Python?

if tn=9999, a=1111 , d=1, find n=?

how to find n?
not only n I want to find all values
like
if n is given but tn is not given then also we will use that program to find value.

Anybody?

Answer 1

Explicitly state the 4 different equations and use conditional statements to determine which equation should be used based off of user input which is left blank

https://code.sololearn.com/cLevG8sAT3cU/?ref=app