How do you calculate an expression in python?

Question

for example how do you calculate 2x+1=3, solve for x.

this is what the code should start with
expression = input(‘Enter an expression: ’)

Answer 1

First, you have to manipulate input string and isolate x in one side.
x=(3-1)/2
After that, you could use eval
print(eval("(3-1)/2"))
>> 1.0

Answer 2

for example...?

Answer 3

i know how to do that, but what i really need is for it to take input from user and calculate that expression.

Answer 4

it must start like this.
expression = input(‘Enter an expression: ’)