Editor
The equation of the straight line passing through the point of intersection of x-y-4=0 and 7x+y+20=0, and perpendicular to the line 6x+y-14=0 is:
Difficulty: Easy
A: 
x+7y-34=0
B: 
x+6y+34=0
C: 
x+6y-34=0
D: 
x-6y-34=0
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