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Coordinate Geometryhard
0:00.0

If the lines x+y−5=0x+y-5=0x+y−5=0, 2x+y−8=02x+y-8=02x+y−8=0, and 3x+ky−13=03x+ky-13=03x+ky−13=0 are concurrent, find kkk.