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Mathematics 14 Online
OpenStudy (anonymous):

Which of the following ordered pairs is a solution of x + y = 1? (-2, 6) (2, -6) (-2, -6)

OpenStudy (mathstudent55):

Since the equation is x + y = 1, add the x- and y-coordinates of the each point. If the result is 1, the answer is yes. If the answer is not 1, the answer is no.

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