OG详解-OG3 数学1 Q16

Choice A is correct. Subtracting 14 j from each side of the given equation results in 5k=m-14j. Dividing each side of this equation by 5 results in k=m−14j5​​ 
Choice B is incorrect and may result from conceptual or calculation errors. 
Choice C is incorrect and may result from conceptual or calculation errors. 
Choice D is incorrect and may result from conceptual or calculation errors.