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posted by Rox on Wednesday, February 27, 2013 at 1:39am.

The lines x=4y−a and y=4x−b intersect at the point (1,2). What is a+b?

X = 4y-a = 1 4*2 - a = 1 a = 7. Y = 4x - b = 2 4*1 - b = 2 b = 2. a + b = 7 + 2 = 9.

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