Linear Equations in Two Variables
has slope 8 7. The second equation in this system, 3x5y =3,isrepresented by a line that has slope 3 5 = 3 5. Since the two slopes are not equal, the lines have to intersect in exactly one point. That one point will be the unique solution. As we’ve seen before, x =3andy =2isasolutionofthissystem. It is the unique solution. Example. The system ...
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