Absolute Value

[Steve F]

Hello,

    I am new to Python and Sympy and have looked around the web for a good bit and found a solution to this problem

Solve: Abs(2*x -4) =14.   

    I could do it this way:

#Solving a single Linear Equation for X.

#https://docs.sympy.org/latest/modules/solvers/solvers.html

from sympy.solvers import solve

from sympy import Symbol

x = Symbol('x')

solve(2*x - 4 -14,x)

and

#Solving a single Linear Equation for X.

#https://docs.sympy.org/latest/modules/solvers/solvers.html

from sympy.solvers import solve

from sympy import Symbol

x = Symbol('x')

solve(2*x -4  + 14,x)

But I wonder if there is a better way.

Also, I would like to plot this in Jupyter Lab/Python.

Thank you,

Steve.

[Aaron Meurer]

It works but for solve you need to set x as real using

>>> x = symbols('x', real=True)
>>> solve(abs(2*x - 4) - 14, x)
[-5, 9]

alternately you can use solveset

>>> solveset(abs(2*x - 4) - 14, x, S.Reals)
{-5, 9}

Aaron Meurer

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[Chris Smith]

As noted, this will work if you make `x` real. You can also state the equation as an Equality and solve it:

>>> var('x', real=True)

x

>>> solve(Eq(abs(2*x -4), 14))

[-5, 9]

/c