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Straight lines x-y=7andx+4y=2 intersect ...

Straight lines `x-y=7andx+4y=2` intersect at B. Points A and C are so chosen on these two lines such that AB=AC. The equation of line AC passing through (2,-7) is

A

`x-y-9=0`

B

`23x+7y+3=0`

C

`2x-y-11=0`

D

`7x-6y-56=0`

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