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Question
How many solution(s) of the equation 2x + 1 = x – 3 are there on the cartesian plane?
Solution
2x + 1 = x – 3
2x – x = – 3 – 1
∴ x = – 4 ...(i)
And it can be written as 1.x + 0.y = – 4 ...(ii)
Whereas the equation x + 4 = 0 represent a straight line parallel to y-axis and infinitely many points lie on a line in the cartesian plane.
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