Given the inequality:
$$6 x - 5 < 13$$
To solve this inequality, we must first solve the corresponding equation:
$$6 x - 5 = 13$$
Solve:
Given the linear equation:
6*x-5 = 13
Move free summands (without x)
from left part to right part, we given:
$$6 x = 18$$
Divide both parts of the equation by 6
x = 18 / (6)
$$x_{1} = 3$$
$$x_{1} = 3$$
This roots
$$x_{1} = 3$$
is the points with change the sign of the inequality expression.
First define with the sign to the leftmost point:
$$x_{0} < x_{1}$$
For example, let's take the point
$$x_{0} = x_{1} - \frac{1}{10}$$
=
$$- \frac{1}{10} + 3$$
=
$$\frac{29}{10}$$
substitute to the expression
$$6 x - 5 < 13$$
$$\left(-1\right) 5 + 6 \cdot \frac{29}{10} < 13$$
62/5 < 13
the solution of our inequality is:
$$x < 3$$
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