He was making a commentary on the political division in the country.
<h2>Answer:</h2><h2 />
There are two ways to solve a system of linear equations (equations representing a line) of two or more equations and find if there is a solution (or solutions) that satisfies all the equations in the system at the same time or <u>if there is not solution</u>.
1. Graphically, plotting the graphs of the lines and determining if they intersect and in which point.
2. Algebraically, combining the equations to delete each unknown except one, and then clear it.
In this context, a system of linear equations <u>has no solution</u> when the two lines are <u>parallel</u> and distinct, that is, they do not intersect or there is no intersection point.
Now, when two lines are parallel they have the same slope. We will be able to recognize it if we write the equation in the slope-intersect form:

Where
is the slope and
the intersection point.
Answer:
One of the first problems arose with prohibition which led to a devaluation of alcohol. As well as other laws led to continuous devaluations. With the policy of protectionism, the United States ended up falling into a crisis of overproduction. So there were inflations, the smuggling that became more and more important in the trade. America initially had to abandon investment in European industries. The American man of the '20s lived a day, regardless of tomorrow. The great crisis will bring this population back down to earth.
Sorry for the english, i'm italian.