Query about Question 3 from "PrepSwift: Linear Equations on the Plane" [3218]

[user9529]

https://prepswift.gregmat.com/quizzes/quiz/prepswift-linear-equations-on-the-plane (Question 3)

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Why can’t we take and see the answer putting in second x and y values which are in negative. Secondly, why answer has been found only by taking first x and y values?

[Kweku]

@user9529

Why can’t we take and see the answer putting in second x and y values which are in negative

We can do that. You will get the same answer.

@user9529

Secondly, why answer has been found only by taking first x and y values?

You can use second x and y-values. You will get the same answer