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Number of Solutions
 
Question: How do we determine the number of solutions to the following system of linear equations?
 
 
Yours Truly answers: We first convert each equation into the form y = mx + b.
From the first equation, we get:
    

From the second equation, we get

Both of the original equations have yielded an identical equation. Geometrically, this means that the corresponding lines sit on top of each other, resulting in infinitely many points of intersection.

Algebraically, we conclude that the original system of equations has infinitely many solutions.
 
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