|2x-4|<=0 inequation

Given the inequality:
$$\left|{2 x - 4}\right| \leq 0$$
To solve this inequality, we must first solve the corresponding equation:
$$\left|{2 x - 4}\right| = 0$$
Solve:
For every modulo expressions in the equation
allow cases, when this expressions ">=0" or "<0",
solve the resulting equation.

1.
$$2 x - 4 \geq 0$$
or
$$2 \leq x \wedge x < \infty$$
we get the equation
$$2 x - 4 = 0$$
after simplifying we get
$$2 x - 4 = 0$$
the solution in this interval:
$$x_{1} = 2$$

2.
$$2 x - 4 < 0$$
or
$$-\infty < x \wedge x < 2$$
we get the equation
$$4 - 2 x = 0$$
after simplifying we get
$$4 - 2 x = 0$$
the solution in this interval:
$$x_{2} = 2$$
but x2 not in the inequality interval


$$x_{1} = 2$$
$$x_{1} = 2$$
This roots
$$x_{1} = 2$$
is the points with change the sign of the inequality expression.
First define with the sign to the leftmost point:
$$x_{0} \leq x_{1}$$
For example, let's take the point
$$x_{0} = x_{1} - \frac{1}{10}$$
=
$$- \frac{1}{10} + 2$$
=
$$\frac{19}{10}$$
substitute to the expression
$$\left|{2 x - 4}\right| \leq 0$$
$$\left|{-4 + \frac{2 \cdot 19}{10}}\right| \leq 0$$

1/5 <= 0

but

1/5 >= 0

Then
$$x \leq 2$$
no execute
the solution of our inequality is:
$$x \geq 2$$

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