X is an algebraic variable which has no defined value. X is kind of universe variable taken in most of the equations. If X is any question or an equation then we may solve the equation and get the desired value that would satisfy the given equation.
What is the value of x in 2x 7 13?
Both sides of the equation need to be divided by 2 allowing the x to be isolated. This will leave you with x = 3 which is your final solution.