Comparison of Angles in a Line Intersection

In the diagram below, lines $l_1$ and $l_2$ intersect at a point $P$, forming four angles. Angle $1$ measures $x$ degrees, Angle $2$ measures $(2x - 20)$ degrees, and Angle $3$ measures $(3x + 40)$ degrees. Given that Angle $4$ is formed as a linear pair with Angle $2$, calculate the value of $x$ and determine the relationships between the measures of these angles.

What can we infer about the relationship between the measures of Angle $1$ (Quantity A) and Angle $3$ (Quantity B)?