Find the value of kkk such that the lines 3x+4y−7=03x + 4y - 7 = 03x+4y−7=0 and 6x+8y+k=06x + 8y + k = 06x+8y+k=0 are parallel and distinct.
k=−7k = -7k=−7
k=14k = 14k=14
k=−14k = -14k=−14
k≠−14k \neq -14k=−14